21031022202331 has 4 divisors (see below), whose sum is σ = 21031143135472. Its totient is φ = 21030901269192.

The previous prime is 21031022202319. The next prime is 21031022202347. The reversal of 21031022202331 is 13320222013012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21031022202331 - 2¹¹ = 21031022200283 is a prime.

It is a super-2 number, since 2×21031022202331² (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 (21031022208331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60205335 + ... + 60553648.

It is an arithmetic number, because the mean of its divisors is an integer number (5257785783868).

Almost surely, 2^{21031022202331} is an apocalyptic number.

21031022202331 is a deficient number, since it is larger than the sum of its proper divisors (120933141).

21031022202331 is a wasteful number, since it uses less digits than its factorization.

21031022202331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120933140.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21031022202331 its reverse (13320222013012), we get a palindrome (34351244215343).

The spelling of 21031022202331 in words is "twenty-one trillion, thirty-one billion, twenty-two million, two hundred two thousand, three hundred thirty-one".