21131321224364 has 24 divisors (see below), whose sum is σ = 41197668702960. Its totient is φ = 9416609987904.

The previous prime is 21131321224357. The next prime is 21131321224411. The reversal of 21131321224364 is 46342212313112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7006404734 + ... + 7006407749.

It is an arithmetic number, because the mean of its divisors is an integer number (1716569529290).

Almost surely, 2^{21131321224364} is an apocalyptic number.

It is an amenable number.

21131321224364 is a deficient number, since it is larger than the sum of its proper divisors (20066347478596).

21131321224364 is a wasteful number, since it uses less digits than its factorization.

21131321224364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14012812529 (or 14012812527 counting only the distinct ones).

The product of its digits is 41472, while the sum is 35.

Adding to 21131321224364 its reverse (46342212313112), we get a palindrome (67473533537476).

The spelling of 21131321224364 in words is "twenty-one trillion, one hundred thirty-one billion, three hundred twenty-one million, two hundred twenty-four thousand, three hundred sixty-four".