111221012120022 has 140 divisors (see below), whose sum is σ = 291804307169340. Its totient is φ = 31777431034104.

The previous prime is 111221012119979. The next prime is 111221012120083. The reversal of 111221012120022 is 220021210122111.

111221012120022 is a `hidden beast` number, since 1 + 112 + 210 + 121 + 200 + 22 = 666.

It is a super-2 number, since 2×111221012120022² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 111221012119977 and 111221012120004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 69 ways as a sum of consecutive naturals, for example, 12385072 + ... + 19386387.

It is an arithmetic number, because the mean of its divisors is an integer number (2084316479781).

Almost surely, 2^{111221012120022} is an apocalyptic number.

111221012120022 is an abundant number, since it is smaller than the sum of its proper divisors (180583295049318).

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

111221012120022 is an frugal number, since it uses more digits than its factorization.

111221012120022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31771507 (or 31771471 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 111221012120022 its reverse (220021210122111), we get a palindrome (331242222242133).

The spelling of 111221012120022 in words is "one hundred eleven trillion, two hundred twenty-one billion, twelve million, one hundred twenty thousand, twenty-two".