21110021000022 has 16 divisors (see below), whose sum is σ = 42224986480320. Its totient is φ = 7035849586632.

The previous prime is 21110020999957. The next prime is 21110021000149. The reversal of 21110021000022 is 22000012001112.

It is a junction number, because it is equal to n+sod(n) for n = 21110020999971 and 21110021000007.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 205964508 + ... + 206066975.

It is an arithmetic number, because the mean of its divisors is an integer number (2639061655020).

Almost surely, 2^{21110021000022} is an apocalyptic number.

21110021000022 is an abundant number, since it is smaller than the sum of its proper divisors (21114965480298).

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

21110021000022 is a wasteful number, since it uses less digits than its factorization.

21110021000022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412040027.

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

Adding to 21110021000022 its reverse (22000012001112), we get a palindrome (43110033001134).

The spelling of 21110021000022 in words is "twenty-one trillion, one hundred ten billion, twenty-one million, twenty-two", and thus it is an aban number.