212100001022121 has 8 divisors (see below), whose sum is σ = 282803398407264. Its totient is φ = 141398302159200.

The previous prime is 212100001022017. The next prime is 212100001022123. The reversal of 212100001022121 is 121220100001212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 212100001022121 - 2⁹ = 212100001021609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212100001022121.

It is not an unprimeable number, because it can be changed into a prime (212100001022123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 424339155 + ... + 424838696.

It is an arithmetic number, because the mean of its divisors is an integer number (35350424800908).

Almost surely, 2^{212100001022121} is an apocalyptic number.

It is an amenable number.

212100001022121 is a deficient number, since it is larger than the sum of its proper divisors (70703397385143).

212100001022121 is an equidigital number, since it uses as much as digits as its factorization.

212100001022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 849261111.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 212100001022121 its reverse (121220100001212), we get a palindrome (333320101023333).

The spelling of 212100001022121 in words is "two hundred twelve trillion, one hundred billion, one million, twenty-two thousand, one hundred twenty-one".