21102220032131 has 8 divisors (see below), whose sum is σ = 24117116279040. Its totient is φ = 18087397131528.

The previous prime is 21102220032119. The next prime is 21102220032137. The reversal of 21102220032131 is 13123002220112.

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-21102220032131 is a prime.

It is a super-2 number, since 2×21102220032131² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21102220032137) 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, 17718671 + ... + 18872088.

It is an arithmetic number, because the mean of its divisors is an integer number (3014639534880).

Almost surely, 2^{21102220032131} is an apocalyptic number.

21102220032131 is a deficient number, since it is larger than the sum of its proper divisors (3014896246909).

21102220032131 is an equidigital number, since it uses as much as digits as its factorization.

21102220032131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36673153.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21102220032131 its reverse (13123002220112), we get a palindrome (34225222252243).

The spelling of 21102220032131 in words is "twenty-one trillion, one hundred two billion, two hundred twenty million, thirty-two thousand, one hundred thirty-one".