12218791031 has 8 divisors (see below), whose sum is σ = 12547367424. Its totient is φ = 11893845600.

The previous prime is 12218791001. The next prime is 12218791037. The reversal of 12218791031 is 13019781221.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12218791031 is a prime.

It is a super-2 number, since 2×12218791031² (a number of 21 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 = 12218790982 and 12218791000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12218791037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 900920 + ... + 914381.

It is an arithmetic number, because the mean of its divisors is an integer number (1568420928).

Almost surely, 2^12218791031 is an apocalyptic number.

12218791031 is a deficient number, since it is larger than the sum of its proper divisors (328576393).

12218791031 is a wasteful number, since it uses less digits than its factorization.

12218791031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1815481.

The product of its (nonzero) digits is 6048, while the sum is 35.

The spelling of 12218791031 in words is "twelve billion, two hundred eighteen million, seven hundred ninety-one thousand, thirty-one".