111011011020121 has 16 divisors (see below), whose sum is σ = 116178525656064. Its totient is φ = 105872361465024.

The previous prime is 111011011020113. The next prime is 111011011020137. The reversal of 111011011020121 is 121020110110111.

It is a cyclic number.

It is not a de Polignac number, because 111011011020121 - 2³ = 111011011020113 is a prime.

It is a super-2 number, since 2×111011011020121² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111011011020181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5648575 + ... + 15935131.

It is an arithmetic number, because the mean of its divisors is an integer number (7261157853504).

Almost surely, 2^{111011011020121} is an apocalyptic number.

It is an amenable number.

111011011020121 is a deficient number, since it is larger than the sum of its proper divisors (5167514635943).

111011011020121 is a wasteful number, since it uses less digits than its factorization.

111011011020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10287960.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 111011011020121 its reverse (121020110110111), we get a palindrome (232031121130232).

The spelling of 111011011020121 in words is "one hundred eleven trillion, eleven billion, eleven million, twenty thousand, one hundred twenty-one".