21132102313121 has 8 divisors (see below), whose sum is σ = 21266661561024. Its totient is φ = 20997602997840.

The previous prime is 21132102312989. The next prime is 21132102313169. The reversal of 21132102313121 is 12131320123112.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21132102313121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21132102313321) 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, 14275610 + ... + 15686211.

It is an arithmetic number, because the mean of its divisors is an integer number (2658332695128).

Almost surely, 2^{21132102313121} is an apocalyptic number.

It is an amenable number.

21132102313121 is a deficient number, since it is larger than the sum of its proper divisors (134559247903).

21132102313121 is a wasteful number, since it uses less digits than its factorization.

21132102313121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29966311.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 21132102313121 its reverse (12131320123112), we get a palindrome (33263422436233).

The spelling of 21132102313121 in words is "twenty-one trillion, one hundred thirty-two billion, one hundred two million, three hundred thirteen thousand, one hundred twenty-one".