21431312022 has 8 divisors (see below), whose sum is σ = 42862624056. Its totient is φ = 7143770672.

The previous prime is 21431311997. The next prime is 21431312033. The reversal of 21431312022 is 22021313412.

It is a sphenic number, since it is the product of 3 distinct primes.

21431312022 is an admirable number.

It is a super-2 number, since 2×21431312022² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21431312022.

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 3 ways as a sum of consecutive naturals, for example, 1785942663 + ... + 1785942674.

It is an arithmetic number, because the mean of its divisors is an integer number (5357828007).

Almost surely, 2^21431312022 is an apocalyptic number.

21431312022 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21431312022 is a wasteful number, since it uses less digits than its factorization.

21431312022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3571885342.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21431312022 its reverse (22021313412), we get a palindrome (43452625434).

The spelling of 21431312022 in words is "twenty-one billion, four hundred thirty-one million, three hundred twelve thousand, twenty-two".