1220121010120 has 64 divisors (see below), whose sum is σ = 2878840278000. Its totient is φ = 464764059648.

The previous prime is 1220121010081. The next prime is 1220121010181. The reversal of 1220121010120 is 210101210221.

It can be written as a sum of positive squares in 8 ways, for example, as 908594052804 + 311526957316 = 953202^2 + 558146^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1220121010120.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7119625 + ... + 7288984.

Almost surely, 2^{1220121010120} is an apocalyptic number.

1220121010120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220121010120 is an abundant number, since it is smaller than the sum of its proper divisors (1658719267880).

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

1220121010120 is a wasteful number, since it uses less digits than its factorization.

1220121010120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14408722 (or 14408718 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1220121010120 its reverse (210101210221), we get a palindrome (1430222220341).

The spelling of 1220121010120 in words is "one trillion, two hundred twenty billion, one hundred twenty-one million, ten thousand, one hundred twenty".