21322201031 has 4 divisors (see below), whose sum is σ = 21430435752. Its totient is φ = 21213966312.

The previous prime is 21322201013. The next prime is 21322201051. The reversal of 21322201031 is 13010222312.

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 21322201031 - 2⁶ = 21322200967 is a prime.

It is a super-2 number, since 2×21322201031² (a number of 21 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 (21322201051) 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, 54117065 + ... + 54117458.

It is an arithmetic number, because the mean of its divisors is an integer number (5357608938).

Almost surely, 2^21322201031 is an apocalyptic number.

21322201031 is a deficient number, since it is larger than the sum of its proper divisors (108234721).

21322201031 is a wasteful number, since it uses less digits than its factorization.

21322201031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108234720.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21322201031 its reverse (13010222312), we get a palindrome (34332423343).

The spelling of 21322201031 in words is "twenty-one billion, three hundred twenty-two million, two hundred one thousand, thirty-one".