111330212121 has 6 divisors (see below), whose sum is σ = 160810306410. Its totient is φ = 74220141408.

The previous prime is 111330212117. The next prime is 111330212141. The reversal of 111330212121 is 121212033111.

111330212121 is a `hidden beast` number, since 1 + 1 + 1 + 330 + 212 + 121 = 666.

It can be written as a sum of positive squares in only one way, i.e., 108632864025 + 2697348096 = 329595^2 + 51936^2 .

It is not a de Polignac number, because 111330212121 - 2² = 111330212117 is a prime.

It is a super-2 number, since 2×111330212121² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111330212094 and 111330212103.

It is not an unprimeable number, because it can be changed into a prime (111330212141) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6185011776 + ... + 6185011793.

It is an arithmetic number, because the mean of its divisors is an integer number (26801717735).

Almost surely, 2^111330212121 is an apocalyptic number.

It is an amenable number.

111330212121 is a deficient number, since it is larger than the sum of its proper divisors (49480094289).

111330212121 is a wasteful number, since it uses less digits than its factorization.

111330212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12370023575 (or 12370023572 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 111330212121 its reverse (121212033111), we get a palindrome (232542245232).

The spelling of 111330212121 in words is "one hundred eleven billion, three hundred thirty million, two hundred twelve thousand, one hundred twenty-one".