21255422022 has 12 divisors (see below), whose sum is σ = 46053414420. Its totient is φ = 7085140668.

The previous prime is 21255422021. The next prime is 21255422029. The reversal of 21255422022 is 22022455212.

It is a happy number.

21255422022 is a `hidden beast` number, since 212 + 5 + 5 + 422 + 0 + 22 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21255422021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 590428372 + ... + 590428407.

It is an arithmetic number, because the mean of its divisors is an integer number (3837784535).

Almost surely, 2^21255422022 is an apocalyptic number.

21255422022 is an abundant number, since it is smaller than the sum of its proper divisors (24797992398).

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

21255422022 is a wasteful number, since it uses less digits than its factorization.

21255422022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1180856787 (or 1180856784 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

Adding to 21255422022 its reverse (22022455212), we get a palindrome (43277877234).

The spelling of 21255422022 in words is "twenty-one billion, two hundred fifty-five million, four hundred twenty-two thousand, twenty-two".