12400531311 has 8 divisors (see below), whose sum is σ = 18896047744. Its totient is φ = 7086017880.

The previous prime is 12400531271. The next prime is 12400531327. The reversal of 12400531311 is 11313500421.

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

It is not a de Polignac number, because 12400531311 - 2¹⁵ = 12400498543 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 590501491 = 12400531311 / (1 + 2 + 4 + 0 + 0 + 5 + 3 + 1 + 3 + 1 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12400531331) 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, 295250725 + ... + 295250766.

It is an arithmetic number, because the mean of its divisors is an integer number (2362005968).

Almost surely, 2^12400531311 is an apocalyptic number.

12400531311 is a deficient number, since it is larger than the sum of its proper divisors (6495516433).

12400531311 is an equidigital number, since it uses as much as digits as its factorization.

12400531311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 590501501.

The product of its (nonzero) digits is 360, while the sum is 21.

The spelling of 12400531311 in words is "twelve billion, four hundred million, five hundred thirty-one thousand, three hundred eleven".