111221020220120 has 32 divisors (see below), whose sum is σ = 250250166504720. Its totient is φ = 44487897686400.

The previous prime is 111221020220119. The next prime is 111221020220143. The reversal of 111221020220120 is 21022020122111.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12410231 + ... + 19402470.

Almost surely, 2^{111221020220120} is an apocalyptic number.

111221020220120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111221020220120 is an abundant number, since it is smaller than the sum of its proper divisors (139029146284600).

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

111221020220120 is a wasteful number, since it uses less digits than its factorization.

111221020220120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31900115 (or 31900111 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 111221020220120 its reverse (21022020122111), we get a palindrome (132243040342231).

The spelling of 111221020220120 in words is "one hundred eleven trillion, two hundred twenty-one billion, twenty million, two hundred twenty thousand, one hundred twenty".