111211121010121 has 32 divisors (see below), whose sum is σ = 124362987826176. Its totient is φ = 98596575000000.

The previous prime is 111211121010107. The next prime is 111211121010151. The reversal of 111211121010121 is 121010121112111.

It is not a de Polignac number, because 111211121010121 - 2¹¹ = 111211121008073 is a prime.

It is a super-2 number, since 2×111211121010121² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111211121010095 and 111211121010104.

It is not an unprimeable number, because it can be changed into a prime (111211121010151) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 847250746 + ... + 847381996.

It is an arithmetic number, because the mean of its divisors is an integer number (3886343369568).

Almost surely, 2^{111211121010121} is an apocalyptic number.

111211121010121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111211121010121 is a deficient number, since it is larger than the sum of its proper divisors (13151866816055).

111211121010121 is a wasteful number, since it uses less digits than its factorization.

111211121010121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142813.

The product of its (nonzero) digits is 8, while the sum is 16.

Adding to 111211121010121 its reverse (121010121112111), we get a palindrome (232221242122232).

The spelling of 111211121010121 in words is "one hundred eleven trillion, two hundred eleven billion, one hundred twenty-one million, ten thousand, one hundred twenty-one".