1220211220020 has 192 divisors, whose sum is σ = 3842644990464. Its totient is φ = 287056281600.

The previous prime is 1220211219973. The next prime is 1220211220037. The reversal of 1220211220020 is 200221120221.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 21517624 + ... + 21574256.

It is an arithmetic number, because the mean of its divisors is an integer number (20013775992).

Almost surely, 2^{1220211220020} is an apocalyptic number.

1220211220020 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 1220211220020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1921322495232).

1220211220020 is an abundant number, since it is smaller than the sum of its proper divisors (2622433770444).

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

1220211220020 is a wasteful number, since it uses less digits than its factorization.

1220211220020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57882 (or 57880 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1220211220020 its reverse (200221120221), we get a palindrome (1420432340241).

The spelling of 1220211220020 in words is "one trillion, two hundred twenty billion, two hundred eleven million, two hundred twenty thousand, twenty".