21412124331 has 32 divisors (see below), whose sum is σ = 31889433408. Its totient is φ = 12693542400.

The previous prime is 21412124323. The next prime is 21412124339. The reversal of 21412124331 is 13342121412.

It is an interprime number because it is at equal distance from previous prime (21412124323) and next prime (21412124339).

It is not a de Polignac number, because 21412124331 - 2³ = 21412124323 is a prime.

It is a super-2 number, since 2×21412124331² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21412124339) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72285 + ... + 219201.

It is an arithmetic number, because the mean of its divisors is an integer number (996544794).

Almost surely, 2^21412124331 is an apocalyptic number.

21412124331 is a deficient number, since it is larger than the sum of its proper divisors (10477309077).

21412124331 is a wasteful number, since it uses less digits than its factorization.

21412124331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147071.

The product of its digits is 1152, while the sum is 24.

Adding to 21412124331 its reverse (13342121412), we get a palindrome (34754245743).

The spelling of 21412124331 in words is "twenty-one billion, four hundred twelve million, one hundred twenty-four thousand, three hundred thirty-one".