12201220020 has 96 divisors (see below), whose sum is σ = 37319942016. Its totient is φ = 2953843200.

The previous prime is 12201220013. The next prime is 12201220027. The reversal of 12201220020 is 2002210221.

It is an interprime number because it is at equal distance from previous prime (12201220013) and next prime (12201220027).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 12201219978 and 12201220005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12201220027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 487410 + ... + 511830.

It is an arithmetic number, because the mean of its divisors is an integer number (388749396).

Almost surely, 2^12201220020 is an apocalyptic number.

12201220020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12201220020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18659971008).

12201220020 is an abundant number, since it is smaller than the sum of its proper divisors (25118721996).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12201220020 is a wasteful number, since it uses less digits than its factorization.

12201220020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25201 (or 25199 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 12201220020 its reverse (2002210221), we get a palindrome (14203430241).

It can be divided in two parts, 12201 and 220020, that added together give a triangular number (232221 = T₆₈₁).

The spelling of 12201220020 in words is "twelve billion, two hundred one million, two hundred twenty thousand, twenty".