21123113314132 has 12 divisors (see below), whose sum is σ = 37964514470260. Its totient is φ = 10276109179776.

The previous prime is 21123113314109. The next prime is 21123113314157. The reversal of 21123113314132 is 23141331132112.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11376953604676 + 9746159709456 = 3372974^2 + 3121884^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21123113314132.

It is a congruent number.

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, 71361869157 + ... + 71361869452.

Almost surely, 2^{21123113314132} is an apocalyptic number.

It is an amenable number.

21123113314132 is a deficient number, since it is larger than the sum of its proper divisors (16841401156128).

21123113314132 is a wasteful number, since it uses less digits than its factorization.

21123113314132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142723738650 (or 142723738648 counting only the distinct ones).

The product of its digits is 2592, while the sum is 28.

Adding to 21123113314132 its reverse (23141331132112), we get a palindrome (44264444446244).

The spelling of 21123113314132 in words is "twenty-one trillion, one hundred twenty-three billion, one hundred thirteen million, three hundred fourteen thousand, one hundred thirty-two".