1220221110120 has 64 divisors (see below), whose sum is σ = 3875996473920. Its totient is φ = 306251572224.

The previous prime is 1220221110041. The next prime is 1220221110139. The reversal of 1220221110120 is 210111220221.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1220221110120.

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, 299071762 + ... + 299075841.

It is an arithmetic number, because the mean of its divisors is an integer number (60562444905).

Almost surely, 2^{1220221110120} is an apocalyptic number.

1220221110120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220221110120 is an abundant number, since it is smaller than the sum of its proper divisors (2655775363800).

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

1220221110120 is a wasteful number, since it uses less digits than its factorization.

1220221110120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598147634 (or 598147630 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1220221110120 its reverse (210111220221), we get a palindrome (1430332330341).

The spelling of 1220221110120 in words is "one trillion, two hundred twenty billion, two hundred twenty-one million, one hundred ten thousand, one hundred twenty".