111402454121 has 16 divisors (see below), whose sum is σ = 137134694400. Its totient is φ = 88358367888.

The previous prime is 111402454109. The next prime is 111402454187. The reversal of 111402454121 is 121454204111.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-111402454121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111402484121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9733961 + ... + 9745398.

It is an arithmetic number, because the mean of its divisors is an integer number (8570918400).

Almost surely, 2^111402454121 is an apocalyptic number.

It is an amenable number.

111402454121 is a deficient number, since it is larger than the sum of its proper divisors (25732240279).

111402454121 is a wasteful number, since it uses less digits than its factorization.

111402454121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19479428.

The product of its (nonzero) digits is 1280, while the sum is 26.

Adding to 111402454121 its reverse (121454204111), we get a palindrome (232856658232).

The spelling of 111402454121 in words is "one hundred eleven billion, four hundred two million, four hundred fifty-four thousand, one hundred twenty-one".