31312023101 has 4 divisors (see below), whose sum is σ = 31558574592. Its totient is φ = 31065471612.

The previous prime is 31312023097. The next prime is 31312023109. The reversal of 31312023101 is 10132021313.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10132021313 = 1499 ⋅6759187.

It is a cyclic number.

It is not a de Polignac number, because 31312023101 - 2² = 31312023097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31312023101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31312023109) 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, 123275555 + ... + 123275808.

It is an arithmetic number, because the mean of its divisors is an integer number (7889643648).

Almost surely, 2^31312023101 is an apocalyptic number.

It is an amenable number.

31312023101 is a deficient number, since it is larger than the sum of its proper divisors (246551491).

31312023101 is a wasteful number, since it uses less digits than its factorization.

31312023101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246551490.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 31312023101 its reverse (10132021313), we get a palindrome (41444044414).

The spelling of 31312023101 in words is "thirty-one billion, three hundred twelve million, twenty-three thousand, one hundred one".