21023122410 has 24 divisors (see below), whose sum is σ = 54660118500. Its totient is φ = 5606165952.

The previous prime is 21023122399. The next prime is 21023122429. The reversal of 21023122410 is 1422132012.

It is a happy number.

21023122410 is a `hidden beast` number, since 2 + 1 + 0 + 231 + 22 + 410 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 20842408161 + 180714249 = 144369^2 + 13443^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 116795035 + ... + 116795214.

Almost surely, 2^21023122410 is an apocalyptic number.

21023122410 is an abundant number, since it is smaller than the sum of its proper divisors (33636996090).

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

21023122410 is a wasteful number, since it uses less digits than its factorization.

21023122410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233590262 (or 233590259 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21023122410 its reverse (1422132012), we get a palindrome (22445254422).

The spelling of 21023122410 in words is "twenty-one billion, twenty-three million, one hundred twenty-two thousand, four hundred ten".