31212130102319 has 4 divisors (see below), whose sum is σ = 31230898672896. Its totient is φ = 31193361531744.

The previous prime is 31212130102301. The next prime is 31212130102369. The reversal of 31212130102319 is 91320103121213.

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 31212130102319 - 2¹² = 31212130098223 is a prime.

It is a super-2 number, since 2×31212130102319² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31212130102291 and 31212130102300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31212130102369) 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, 9384282794 + ... + 9384286119.

It is an arithmetic number, because the mean of its divisors is an integer number (7807724668224).

Almost surely, 2^{31212130102319} is an apocalyptic number.

31212130102319 is a deficient number, since it is larger than the sum of its proper divisors (18768570577).

31212130102319 is a wasteful number, since it uses less digits than its factorization.

31212130102319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18768570576.

The product of its (nonzero) digits is 1944, while the sum is 29.

The spelling of 31212130102319 in words is "thirty-one trillion, two hundred twelve billion, one hundred thirty million, one hundred two thousand, three hundred nineteen".