113021131 has 4 divisors (see below), whose sum is σ = 114021432. Its totient is φ = 112020832.

The previous prime is 113021107. The next prime is 113021141. The reversal of 113021131 is 131120311.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 113021131 - 2¹⁷ = 112890059 is a prime.

It is a super-2 number, since 2×113021131² = 25547552105038322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (113021141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 499981 + ... + 500206.

It is an arithmetic number, because the mean of its divisors is an integer number (28505358).

Almost surely, 2^113021131 is an apocalyptic number.

113021131 is a deficient number, since it is larger than the sum of its proper divisors (1000301).

113021131 is a wasteful number, since it uses less digits than its factorization.

113021131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000300.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 113021131 is about 10631.1396849068. The cubic root of 113021131 is about 483.4889464322.

Adding to 113021131 its reverse (131120311), we get a palindrome (244141442).

The spelling of 113021131 in words is "one hundred thirteen million, twenty-one thousand, one hundred thirty-one".