2100120212101 has 4 divisors (see below), whose sum is σ = 2100123180000. Its totient is φ = 2100117244204.

The previous prime is 2100120212093. The next prime is 2100120212123. The reversal of 2100120212101 is 1012120210012.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2100120212101 - 2³ = 2100120212093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100120212191) 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, 262950 + ... + 2066248.

It is an arithmetic number, because the mean of its divisors is an integer number (525030795000).

Almost surely, 2^{2100120212101} is an apocalyptic number.

It is an amenable number.

2100120212101 is a deficient number, since it is larger than the sum of its proper divisors (2967899).

2100120212101 is a wasteful number, since it uses less digits than its factorization.

2100120212101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2967898.

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

Adding to 2100120212101 its reverse (1012120210012), we get a palindrome (3112240422113).

The spelling of 2100120212101 in words is "two trillion, one hundred billion, one hundred twenty million, two hundred twelve thousand, one hundred one".