21231303022 has 4 divisors (see below), whose sum is σ = 31846954536. Its totient is φ = 10615651510.

The previous prime is 21231302977. The next prime is 21231303029. The reversal of 21231303022 is 22030313212.

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 (21231303029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5307825754 + ... + 5307825757.

It is an arithmetic number, because the mean of its divisors is an integer number (7961738634).

Almost surely, 2^21231303022 is an apocalyptic number.

21231303022 is a deficient number, since it is larger than the sum of its proper divisors (10615651514).

21231303022 is a wasteful number, since it uses less digits than its factorization.

21231303022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10615651513.

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

Adding to 21231303022 its reverse (22030313212), we get a palindrome (43261616234).

The spelling of 21231303022 in words is "twenty-one billion, two hundred thirty-one million, three hundred three thousand, twenty-two".