21110021022 has 16 divisors (see below), whose sum is σ = 44442149760. Its totient is φ = 6666322392.

The previous prime is 21110021017. The next prime is 21110021029. The reversal of 21110021022 is 22012001112.

It is a junction number, because it is equal to n+sod(n) for n = 21110020989 and 21110021007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110021029) 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, 92587698 + ... + 92587925.

It is an arithmetic number, because the mean of its divisors is an integer number (2777634360).

Almost surely, 2^21110021022 is an apocalyptic number.

21110021022 is an abundant number, since it is smaller than the sum of its proper divisors (23332128738).

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

21110021022 is a wasteful number, since it uses less digits than its factorization.

21110021022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185175647.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21110021022 its reverse (22012001112), we get a palindrome (43122022134).

The spelling of 21110021022 in words is "twenty-one billion, one hundred ten million, twenty-one thousand, twenty-two".