21230331022 has 4 divisors (see below), whose sum is σ = 31845496536. Its totient is φ = 10615165510.

The previous prime is 21230331019. The next prime is 21230331029. The reversal of 21230331022 is 22013303212.

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 (21230331029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5307582754 + ... + 5307582757.

It is an arithmetic number, because the mean of its divisors is an integer number (7961374134).

Almost surely, 2^21230331022 is an apocalyptic number.

21230331022 is a deficient number, since it is larger than the sum of its proper divisors (10615165514).

21230331022 is a wasteful number, since it uses less digits than its factorization.

21230331022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10615165513.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21230331022 its reverse (22013303212), we get a palindrome (43243634234).

The spelling of 21230331022 in words is "twenty-one billion, two hundred thirty million, three hundred thirty-one thousand, twenty-two".