21210012120022 has 24 divisors (see below), whose sum is σ = 36868992453720. Its totient is φ = 9073801973760.

The previous prime is 21210012119993. The next prime is 21210012120029. The reversal of 21210012120022 is 22002121001212.

It is a happy number.

It is a super-2 number, since 2×21210012120022² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21210012119978 and 21210012120005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21210012120029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1667971947 + ... + 1667984662.

It is an arithmetic number, because the mean of its divisors is an integer number (1536208018905).

Almost surely, 2^{21210012120022} is an apocalyptic number.

21210012120022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21210012120022 is a deficient number, since it is larger than the sum of its proper divisors (15658980333698).

21210012120022 is a wasteful number, since it uses less digits than its factorization.

21210012120022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3335956656 (or 3335956639 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21210012120022 its reverse (22002121001212), we get a palindrome (43212133121234).

The spelling of 21210012120022 in words is "twenty-one trillion, two hundred ten billion, twelve million, one hundred twenty thousand, twenty-two".