21012121200022 has 16 divisors (see below), whose sum is σ = 32068987473600. Its totient is φ = 10322643144520.

The previous prime is 21012121200013. The next prime is 21012121200073. The reversal of 21012121200022 is 22000212121012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21012121199969 and 21012121200005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45880072 + ... + 46335787.

It is an arithmetic number, because the mean of its divisors is an integer number (2004311717100).

Almost surely, 2^{21012121200022} is an apocalyptic number.

21012121200022 is a deficient number, since it is larger than the sum of its proper divisors (11056866273578).

21012121200022 is a wasteful number, since it uses less digits than its factorization.

21012121200022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92217851.

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

Adding to 21012121200022 its reverse (22000212121012), we get a palindrome (43012333321034).

The spelling of 21012121200022 in words is "twenty-one trillion, twelve billion, one hundred twenty-one million, two hundred thousand, twenty-two".