21132000123 has 16 divisors (see below), whose sum is σ = 30389327136. Its totient is φ = 12984618240.

The previous prime is 21132000121. The next prime is 21132000179. The reversal of 21132000123 is 32100023112.

It is not a de Polignac number, because 21132000123 - 2¹ = 21132000121 is a prime.

It is a super-2 number, since 2×21132000123² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21132000121) 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, 384090 + ... + 435647.

It is an arithmetic number, because the mean of its divisors is an integer number (1899332946).

Almost surely, 2^21132000123 is an apocalyptic number.

21132000123 is a deficient number, since it is larger than the sum of its proper divisors (9257327013).

21132000123 is a wasteful number, since it uses less digits than its factorization.

21132000123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820414.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21132000123 its reverse (32100023112), we get a palindrome (53232023235).

The spelling of 21132000123 in words is "twenty-one billion, one hundred thirty-two million, one hundred twenty-three", and thus it is an aban number.