111100122021 has 96 divisors (see below), whose sum is σ = 177872744448. Its totient is φ = 61481185920.

The previous prime is 111100122019. The next prime is 111100122031. The reversal of 111100122021 is 120221001111.

It is not a de Polignac number, because 111100122021 - 2¹ = 111100122019 is a prime.

It is a super-2 number, since 2×111100122021² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111100121988 and 111100122006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111100122031) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 239956836 + ... + 239957298.

It is an arithmetic number, because the mean of its divisors is an integer number (1852841088).

Almost surely, 2^111100122021 is an apocalyptic number.

It is an amenable number.

111100122021 is a deficient number, since it is larger than the sum of its proper divisors (66772622427).

111100122021 is a wasteful number, since it uses less digits than its factorization.

111100122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 911 (or 904 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 111100122021 its reverse (120221001111), we get a palindrome (231321123132).

The spelling of 111100122021 in words is "one hundred eleven billion, one hundred million, one hundred twenty-two thousand, twenty-one".