12402311421 has 16 divisors (see below), whose sum is σ = 17152790336. Its totient is φ = 7965288576.

The previous prime is 12402311399. The next prime is 12402311429. The reversal of 12402311421 is 12411320421.

It is not a de Polignac number, because 12402311421 - 2⁷ = 12402311293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12402311429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 649090 + ... + 667923.

It is an arithmetic number, because the mean of its divisors is an integer number (1072049396).

Almost surely, 2^12402311421 is an apocalyptic number.

It is an amenable number.

12402311421 is a deficient number, since it is larger than the sum of its proper divisors (4750478915).

12402311421 is a wasteful number, since it uses less digits than its factorization.

12402311421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1317132.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 12402311421 its reverse (12411320421), we get a palindrome (24813631842).

The spelling of 12402311421 in words is "twelve billion, four hundred two million, three hundred eleven thousand, four hundred twenty-one".