12400022331 has 6 divisors (see below), whose sum is σ = 17911143380. Its totient is φ = 8266681548.

The previous prime is 12400022279. The next prime is 12400022339. The reversal of 12400022331 is 13322000421.

12400022331 is a `hidden beast` number, since 12 + 400 + 0 + 223 + 31 = 666.

It is not a de Polignac number, because 12400022331 - 2⁹ = 12400021819 is a prime.

It is a super-2 number, since 2×12400022331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12400022339) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 688890121 + ... + 688890138.

Almost surely, 2^12400022331 is an apocalyptic number.

12400022331 is a deficient number, since it is larger than the sum of its proper divisors (5511121049).

12400022331 is a wasteful number, since it uses less digits than its factorization.

12400022331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1377780265 (or 1377780262 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 12400022331 its reverse (13322000421), we get a palindrome (25722022752).

The spelling of 12400022331 in words is "twelve billion, four hundred million, twenty-two thousand, three hundred thirty-one".