21112200000121 has 16 divisors (see below), whose sum is σ = 22460911804800. Its totient is φ = 19787397493248.

The previous prime is 21112200000103. The next prime is 21112200000149. The reversal of 21112200000121 is 12100000221112.

It is a cyclic number.

It is not a de Polignac number, because 21112200000121 - 2¹³ = 21112199991929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21112200600121) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2757075 + ... + 7058743.

It is an arithmetic number, because the mean of its divisors is an integer number (1403806987800).

Almost surely, 2^{21112200000121} is an apocalyptic number.

It is an amenable number.

21112200000121 is a deficient number, since it is larger than the sum of its proper divisors (1348711804679).

21112200000121 is a wasteful number, since it uses less digits than its factorization.

21112200000121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4304448.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21112200000121 its reverse (12100000221112), we get a palindrome (33212200221233).

The spelling of 21112200000121 in words is "twenty-one trillion, one hundred twelve billion, two hundred million, one hundred twenty-one", and thus it is an aban number.