21200012121022 has 16 divisors (see below), whose sum is σ = 36527359540320. Its totient is φ = 9039599075808.

The previous prime is 21200012120981. The next prime is 21200012121023. The reversal of 21200012121022 is 22012121000212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21200012120987 and 21200012121005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21200012121023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3843364197 + ... + 3843369712.

It is an arithmetic number, because the mean of its divisors is an integer number (2282959971270).

Almost surely, 2^{21200012121022} is an apocalyptic number.

21200012121022 is a deficient number, since it is larger than the sum of its proper divisors (15327347419298).

21200012121022 is a wasteful number, since it uses less digits than its factorization.

21200012121022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7686734115.

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

Adding to 21200012121022 its reverse (22012121000212), we get a palindrome (43212133121234).

The spelling of 21200012121022 in words is "twenty-one trillion, two hundred billion, twelve million, one hundred twenty-one thousand, twenty-two".