2100212011121 has 4 divisors (see below), whose sum is σ = 2400242298432. Its totient is φ = 1800181723812.

The previous prime is 2100212011091. The next prime is 2100212011151. The reversal of 2100212011121 is 1211102120012.

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 an interprime number because it is at equal distance from previous prime (2100212011091) and next prime (2100212011151).

It is a cyclic number.

It is not a de Polignac number, because 2100212011121 - 2¹⁴ = 2100211994737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2100212011096 and 2100212011105.

It is not an unprimeable number, because it can be changed into a prime (2100212011151) 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, 150015143645 + ... + 150015143658.

It is an arithmetic number, because the mean of its divisors is an integer number (600060574608).

Almost surely, 2^{2100212011121} is an apocalyptic number.

It is an amenable number.

2100212011121 is a deficient number, since it is larger than the sum of its proper divisors (300030287311).

2100212011121 is an equidigital number, since it uses as much as digits as its factorization.

2100212011121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300030287310.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2100212011121 its reverse (1211102120012), we get a palindrome (3311314131133).

The spelling of 2100212011121 in words is "two trillion, one hundred billion, two hundred twelve million, eleven thousand, one hundred twenty-one".