20131321022 has 4 divisors (see below), whose sum is σ = 30196981536. Its totient is φ = 10065660510.

The previous prime is 20131320943. The next prime is 20131321027. The reversal of 20131321022 is 22012313102.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20131321027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5032830254 + ... + 5032830257.

It is an arithmetic number, because the mean of its divisors is an integer number (7549245384).

Almost surely, 2^20131321022 is an apocalyptic number.

20131321022 is a deficient number, since it is larger than the sum of its proper divisors (10065660514).

20131321022 is a wasteful number, since it uses less digits than its factorization.

20131321022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10065660513.

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

Adding to 20131321022 its reverse (22012313102), we get a palindrome (42143634124).

The spelling of 20131321022 in words is "twenty billion, one hundred thirty-one million, three hundred twenty-one thousand, twenty-two".