2100211202121 has 16 divisors (see below), whose sum is σ = 2922139027584. Its totient is φ = 1339216507904.

The previous prime is 2100211202087. The next prime is 2100211202143. The reversal of 2100211202121 is 1212021120012.

It is a cyclic number.

It is not a de Polignac number, because 2100211202121 - 2¹⁰ = 2100211201097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2100211202121.

It is not an unprimeable number, because it can be changed into a prime (2100211202171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1412905 + ... + 2489321.

It is an arithmetic number, because the mean of its divisors is an integer number (182633689224).

Almost surely, 2^{2100211202121} is an apocalyptic number.

It is an amenable number.

2100211202121 is a deficient number, since it is larger than the sum of its proper divisors (821927825463).

2100211202121 is a wasteful number, since it uses less digits than its factorization.

2100211202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1104720.

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

Adding to 2100211202121 its reverse (1212021120012), we get a palindrome (3312232322133).

The spelling of 2100211202121 in words is "two trillion, one hundred billion, two hundred eleven million, two hundred two thousand, one hundred twenty-one".