2100012212021 has 4 divisors (see below), whose sum is σ = 2111744124000. Its totient is φ = 2088280300044.

The previous prime is 2100012211897. The next prime is 2100012212027. The reversal of 2100012212021 is 1202122100012.

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 not a de Polignac number, because 2100012212021 - 2¹⁴ = 2100012195637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2100012211987 and 2100012212005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100012212027) 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, 5865955721 + ... + 5865956078.

It is an arithmetic number, because the mean of its divisors is an integer number (527936031000).

Almost surely, 2^{2100012212021} is an apocalyptic number.

It is an amenable number.

2100012212021 is a deficient number, since it is larger than the sum of its proper divisors (11731911979).

2100012212021 is a wasteful number, since it uses less digits than its factorization.

2100012212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11731911978.

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

Adding to 2100012212021 its reverse (1202122100012), we get a palindrome (3302134312033).

The spelling of 2100012212021 in words is "two trillion, one hundred billion, twelve million, two hundred twelve thousand, twenty-one".