11212320431 has 8 divisors (see below), whose sum is σ = 12491179680. Its totient is φ = 9992943072.

The previous prime is 11212320401. The next prime is 11212320433. The reversal of 11212320431 is 13402321211.

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-11212320431 is a prime.

It is a super-2 number, since 2×11212320431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11212320433) 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, 14870075 + ... + 14870828.

It is an arithmetic number, because the mean of its divisors is an integer number (1561397460).

Almost surely, 2^11212320431 is an apocalyptic number.

11212320431 is a deficient number, since it is larger than the sum of its proper divisors (1278859249).

11212320431 is a wasteful number, since it uses less digits than its factorization.

11212320431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29740945.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 11212320431 its reverse (13402321211), we get a palindrome (24614641642).

The spelling of 11212320431 in words is "eleven billion, two hundred twelve million, three hundred twenty thousand, four hundred thirty-one".