12201111001020 has 48 divisors (see below), whose sum is σ = 34208601090048. Its totient is φ = 3249297192000.

The previous prime is 12201111001003. The next prime is 12201111001021. The reversal of 12201111001020 is 2010011110221.

It is a super-2 number, since 2×12201111001020² (a number of 27 digits) contains 22 as substring.

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 = 12201111000987 and 12201111001005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12201111001021) 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 15 ways as a sum of consecutive naturals, for example, 135342324 + ... + 135432443.

It is an arithmetic number, because the mean of its divisors is an integer number (712679189376).

Almost surely, 2^{12201111001020} is an apocalyptic number.

12201111001020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12201111001020 is an abundant number, since it is smaller than the sum of its proper divisors (22007490089028).

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

12201111001020 is a wasteful number, since it uses less digits than its factorization.

12201111001020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270775530 (or 270775528 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 12201111001020 its reverse (2010011110221), we get a palindrome (14211122111241).

The spelling of 12201111001020 in words is "twelve trillion, two hundred one billion, one hundred eleven million, one thousand, twenty".