21031021320331 has 8 divisors (see below), whose sum is σ = 22943155158000. Its totient is φ = 19118924617440.

The previous prime is 21031021320317. The next prime is 21031021320343. The reversal of 21031021320331 is 13302312013012.

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 21031021320331 - 2¹³ = 21031021312139 is a prime.

It is a super-2 number, since 2×21031021320331² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21031021920331) 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, 8092876 + ... + 10370953.

It is an arithmetic number, because the mean of its divisors is an integer number (2867894394750).

Almost surely, 2^{21031021320331} is an apocalyptic number.

21031021320331 is a deficient number, since it is larger than the sum of its proper divisors (1912133837669).

21031021320331 is a wasteful number, since it uses less digits than its factorization.

21031021320331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18567389.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 21031021320331 its reverse (13302312013012), we get a palindrome (34333333333343).

The spelling of 21031021320331 in words is "twenty-one trillion, thirty-one billion, twenty-one million, three hundred twenty thousand, three hundred thirty-one".