21621222143022 has 32 divisors (see below), whose sum is σ = 43501989307392. Its totient is φ = 7163817751584.

The previous prime is 21621222142991. The next prime is 21621222143093. The reversal of 21621222143022 is 22034122212612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116673483 + ... + 116858649.

It is an arithmetic number, because the mean of its divisors is an integer number (1359437165856).

Almost surely, 2^{21621222143022} is an apocalyptic number.

21621222143022 is an abundant number, since it is smaller than the sum of its proper divisors (21880767164370).

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

21621222143022 is a wasteful number, since it uses less digits than its factorization.

21621222143022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301872.

The product of its (nonzero) digits is 9216, while the sum is 30.

Adding to 21621222143022 its reverse (22034122212612), we get a palindrome (43655344355634).

The spelling of 21621222143022 in words is "twenty-one trillion, six hundred twenty-one billion, two hundred twenty-two million, one hundred forty-three thousand, twenty-two".