21002102330231 has 8 divisors (see below), whose sum is σ = 22911589024128. Its totient is φ = 19092649747000.

The previous prime is 21002102330179. The next prime is 21002102330239. The reversal of 21002102330231 is 13203320120012.

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 21002102330231 - 2³⁸ = 20727224423287 is a prime.

It is a super-2 number, since 2×21002102330231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002102330239) 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, 7231715 + ... + 9710916.

It is an arithmetic number, because the mean of its divisors is an integer number (2863948628016).

Almost surely, 2^{21002102330231} is an apocalyptic number.

21002102330231 is a deficient number, since it is larger than the sum of its proper divisors (1909486693897).

21002102330231 is a wasteful number, since it uses less digits than its factorization.

21002102330231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17055333.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21002102330231 its reverse (13203320120012), we get a palindrome (34205422450243).

The spelling of 21002102330231 in words is "twenty-one trillion, two billion, one hundred two million, three hundred thirty thousand, two hundred thirty-one".