21021000022 has 8 divisors (see below), whose sum is σ = 34398000072. Its totient is φ = 9555000000.

The previous prime is 21021000017. The next prime is 21021000041. The reversal of 21021000022 is 22000012012.

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

It is a junction number, because it is equal to n+sod(n) for n = 21020999972 and 21021000008.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 477749979 + ... + 477750022.

It is an arithmetic number, because the mean of its divisors is an integer number (4299750009).

Almost surely, 2^21021000022 is an apocalyptic number.

21021000022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21021000022 is a deficient number, since it is larger than the sum of its proper divisors (13377000050).

21021000022 is a wasteful number, since it uses less digits than its factorization.

21021000022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 955500014.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 21021000022 its reverse (22000012012), we get a palindrome (43021012034).

The spelling of 21021000022 in words is "twenty-one billion, twenty-one million, twenty-two", and thus it is an aban number and an uban number.