113131402121 has 8 divisors (see below), whose sum is σ = 115273864584. Its totient is φ = 110989232640.

The previous prime is 113131402117. The next prime is 113131402177. The reversal of 113131402121 is 121204131311.

It can be written as a sum of positive squares in 4 ways, for example, as 228010000 + 112903392121 = 15100^2 + 336011^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 113131402121 - 2² = 113131402117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 113131402093 and 113131402102.

It is not an unprimeable number, because it can be changed into a prime (113131402721) 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 7 ways as a sum of consecutive naturals, for example, 805091 + ... + 935111.

It is an arithmetic number, because the mean of its divisors is an integer number (14409233073).

Almost surely, 2^113131402121 is an apocalyptic number.

It is an amenable number.

113131402121 is a deficient number, since it is larger than the sum of its proper divisors (2142462463).

113131402121 is a wasteful number, since it uses less digits than its factorization.

113131402121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146491.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 113131402121 its reverse (121204131311), we get a palindrome (234335533432).

The spelling of 113131402121 in words is "one hundred thirteen billion, one hundred thirty-one million, four hundred two thousand, one hundred twenty-one".