21312110022 has 16 divisors (see below), whose sum is σ = 48713394432. Its totient is φ = 6089174280.

The previous prime is 21312110021. The next prime is 21312110023. The reversal of 21312110022 is 22001121312.

It is an interprime number because it is at equal distance from previous prime (21312110021) and next prime (21312110023).

It is a junction number, because it is equal to n+sod(n) for n = 21312109983 and 21312110010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21312110021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 253715554 + ... + 253715637.

It is an arithmetic number, because the mean of its divisors is an integer number (3044587152).

Almost surely, 2^21312110022 is an apocalyptic number.

21312110022 is an abundant number, since it is smaller than the sum of its proper divisors (27401284410).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21312110022 is a wasteful number, since it uses less digits than its factorization.

21312110022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507431203.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21312110022 its reverse (22001121312), we get a palindrome (43313231334).

The spelling of 21312110022 in words is "twenty-one billion, three hundred twelve million, one hundred ten thousand, twenty-two".