101312131 has 4 divisors (see below), whose sum is σ = 101466064. Its totient is φ = 101158200.

The previous prime is 101312117. The next prime is 101312137. The reversal of 101312131 is 131213101.

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 101312131 - 2¹⁵ = 101279363 is a prime.

It is a super-2 number, since 2×101312131² = 20528295775522322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101312137) 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, 75975 + ... + 77296.

It is an arithmetic number, because the mean of its divisors is an integer number (25366516).

Almost surely, 2^101312131 is an apocalyptic number.

101312131 is a deficient number, since it is larger than the sum of its proper divisors (153933).

101312131 is an equidigital number, since it uses as much as digits as its factorization.

101312131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153932.

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

The square root of 101312131 is about 10065.3927394812. The cubic root of 101312131 is about 466.1801924301.

Adding to 101312131 its reverse (131213101), we get a palindrome (232525232).

The spelling of 101312131 in words is "one hundred one million, three hundred twelve thousand, one hundred thirty-one".