21231021022 has 16 divisors (see below), whose sum is σ = 32592384720. Its totient is φ = 10369767232.

The previous prime is 21231021011. The next prime is 21231021041. The reversal of 21231021022 is 22012013212.

It is a happy number.

21231021022 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 21231020987 and 21231021005.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 703753 + ... + 733300.

It is an arithmetic number, because the mean of its divisors is an integer number (2037024045).

Almost surely, 2^21231021022 is an apocalyptic number.

21231021022 is a deficient number, since it is larger than the sum of its proper divisors (11361363698).

21231021022 is a wasteful number, since it uses less digits than its factorization.

21231021022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1437227.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21231021022 its reverse (22012013212), we get a palindrome (43243034234).

It can be divided in two parts, 212310 and 21022, that added together give a palindrome (233332).

The spelling of 21231021022 in words is "twenty-one billion, two hundred thirty-one million, twenty-one thousand, twenty-two".