21002022022031 has 4 divisors (see below), whose sum is σ = 21002340122232. Its totient is φ = 21001703921832.

The previous prime is 21002022022021. The next prime is 21002022022061. The reversal of 21002022022031 is 13022022020012.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21002022022031 is a prime.

It is a super-2 number, since 2×21002022022031² (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 (21002022022021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158951045 + ... + 159083118.

It is an arithmetic number, because the mean of its divisors is an integer number (5250585030558).

Almost surely, 2^{21002022022031} is an apocalyptic number.

21002022022031 is a deficient number, since it is larger than the sum of its proper divisors (318100201).

21002022022031 is an equidigital number, since it uses as much as digits as its factorization.

21002022022031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318100200.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21002022022031 its reverse (13022022020012), we get a palindrome (34024044042043).

The spelling of 21002022022031 in words is "twenty-one trillion, two billion, twenty-two million, twenty-two thousand, thirty-one".