21400131331144 has 16 divisors (see below), whose sum is σ = 40164165025920. Its totient is φ = 10689687324240.

The previous prime is 21400131331133. The next prime is 21400131331219. The reversal of 21400131331144 is 44113313100412.

It is a super-2 number, since 2×21400131331144² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1297283904 + ... + 1297300399.

It is an arithmetic number, because the mean of its divisors is an integer number (2510260314120).

Almost surely, 2^{21400131331144} is an apocalyptic number.

It is an amenable number.

21400131331144 is a deficient number, since it is larger than the sum of its proper divisors (18764033694776).

21400131331144 is a wasteful number, since it uses less digits than its factorization.

21400131331144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2594585340 (or 2594585336 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

Adding to 21400131331144 its reverse (44113313100412), we get a palindrome (65513444431556).

The spelling of 21400131331144 in words is "twenty-one trillion, four hundred billion, one hundred thirty-one million, three hundred thirty-one thousand, one hundred forty-four".