2100212201021 has 4 divisors (see below), whose sum is σ = 2291140582944. Its totient is φ = 1909283819100.

The previous prime is 2100212200981. The next prime is 2100212201033. The reversal of 2100212201021 is 1201022120012.

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 a de Polignac number, because none of the positive numbers 2^k-2100212201021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2100212200987 and 2100212201005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100212201081) 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, 95464190945 + ... + 95464190966.

It is an arithmetic number, because the mean of its divisors is an integer number (572785145736).

Almost surely, 2^{2100212201021} is an apocalyptic number.

It is an amenable number.

2100212201021 is a deficient number, since it is larger than the sum of its proper divisors (190928381923).

2100212201021 is a wasteful number, since it uses less digits than its factorization.

2100212201021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190928381922.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2100212201021 its reverse (1201022120012), we get a palindrome (3301234321033).

The spelling of 2100212201021 in words is "two trillion, one hundred billion, two hundred twelve million, two hundred one thousand, twenty-one".