111022121020 has 48 divisors (see below), whose sum is σ = 243346340160. Its totient is φ = 42467014656.

The previous prime is 111022121011. The next prime is 111022121039. The reversal of 111022121020 is 20121220111.

It is a super-2 number, since 2×111022121020² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1870114 + ... + 1928566.

It is an arithmetic number, because the mean of its divisors is an integer number (5069715420).

Almost surely, 2^111022121020 is an apocalyptic number.

111022121020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111022121020 is an abundant number, since it is smaller than the sum of its proper divisors (132324219140).

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

111022121020 is a wasteful number, since it uses less digits than its factorization.

111022121020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62614 (or 62612 counting only the distinct ones).

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

Adding to 111022121020 its reverse (20121220111), we get a palindrome (131143341131).

Subtracting from 111022121020 its reverse (20121220111), we obtain a palindrome (90900900909).

The spelling of 111022121020 in words is "one hundred eleven billion, twenty-two million, one hundred twenty-one thousand, twenty".