111402412121 has 32 divisors (see below), whose sum is σ = 150115623168. Its totient is φ = 79840131840.

The previous prime is 111402412073. The next prime is 111402412127. The reversal of 111402412121 is 121214204111.

It is not a de Polignac number, because 111402412121 - 2⁶ = 111402412057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111402412093 and 111402412102.

It is not an unprimeable number, because it can be changed into a prime (111402412127) 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, 76391 + ... + 478163.

It is an arithmetic number, because the mean of its divisors is an integer number (4691113224).

Almost surely, 2^111402412121 is an apocalyptic number.

111402412121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111402412121 is a deficient number, since it is larger than the sum of its proper divisors (38713211047).

111402412121 is a wasteful number, since it uses less digits than its factorization.

111402412121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402081.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 111402412121 its reverse (121214204111), we get a palindrome (232616616232).

The spelling of 111402412121 in words is "one hundred eleven billion, four hundred two million, four hundred twelve thousand, one hundred twenty-one".