212100120000121 has 4 divisors (see below), whose sum is σ = 212153052402432. Its totient is φ = 212047187597812.

The previous prime is 212100120000103. The next prime is 212100120000149. The reversal of 212100120000121 is 121000021001212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212100120000121 - 2¹¹ = 212100119998073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212100120000161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26466195145 + ... + 26466203158.

It is an arithmetic number, because the mean of its divisors is an integer number (53038263100608).

Almost surely, 2^{212100120000121} is an apocalyptic number.

It is an amenable number.

212100120000121 is a deficient number, since it is larger than the sum of its proper divisors (52932402311).

212100120000121 is an equidigital number, since it uses as much as digits as its factorization.

212100120000121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52932402310.

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

Adding to 212100120000121 its reverse (121000021001212), we get a palindrome (333100141001333).

The spelling of 212100120000121 in words is "two hundred twelve trillion, one hundred billion, one hundred twenty million, one hundred twenty-one", and thus it is an aban number.