21001200000022 has 32 divisors (see below), whose sum is σ = 34504912915200. Its totient is φ = 9507307260000.

The previous prime is 21001200000019. The next prime is 21001200000047. The reversal of 21001200000022 is 22000000210012.

It is a junction number, because it is equal to n+sod(n) for n = 21001199999954 and 21001200000008.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84190879 + ... + 84439957.

It is an arithmetic number, because the mean of its divisors is an integer number (1078278528600).

Almost surely, 2^{21001200000022} is an apocalyptic number.

21001200000022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21001200000022 is a deficient number, since it is larger than the sum of its proper divisors (13503712915178).

21001200000022 is a wasteful number, since it uses less digits than its factorization.

21001200000022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264612.

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

Adding to 21001200000022 its reverse (22000000210012), we get a palindrome (43001200210034).

The spelling of 21001200000022 in words is "twenty-one trillion, one billion, two hundred million, twenty-two", and thus it is an aban number.