21132330123 has 8 divisors (see below), whose sum is σ = 28425789648. Its totient is φ = 13963545344.

The previous prime is 21132330113. The next prime is 21132330137. The reversal of 21132330123 is 32103323112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21132330123 - 2¹² = 21132326027 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21132330123.

It is not an unprimeable number, because it can be changed into a prime (21132330113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31168290 + ... + 31168967.

It is an arithmetic number, because the mean of its divisors is an integer number (3553223706).

Almost surely, 2^21132330123 is an apocalyptic number.

21132330123 is a deficient number, since it is larger than the sum of its proper divisors (7293459525).

21132330123 is a wasteful number, since it uses less digits than its factorization.

21132330123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62337373.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21132330123 its reverse (32103323112), we get a palindrome (53235653235).

The spelling of 21132330123 in words is "twenty-one billion, one hundred thirty-two million, three hundred thirty thousand, one hundred twenty-three".