2100000202021 has 4 divisors (see below), whose sum is σ = 2100458421792. Its totient is φ = 2099541982252.

The previous prime is 2100000202019. The next prime is 2100000202039. The reversal of 2100000202021 is 1202020000012.

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 2100000202021 - 2¹ = 2100000202019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2100000201989 and 2100000202007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100000202921) 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, 229103011 + ... + 229112176.

It is an arithmetic number, because the mean of its divisors is an integer number (525114605448).

Almost surely, 2^{2100000202021} is an apocalyptic number.

It is an amenable number.

2100000202021 is a deficient number, since it is larger than the sum of its proper divisors (458219771).

2100000202021 is an equidigital number, since it uses as much as digits as its factorization.

2100000202021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458219770.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 2100000202021 its reverse (1202020000012), we get a palindrome (3302020202033).

The spelling of 2100000202021 in words is "two trillion, one hundred billion, two hundred two thousand, twenty-one".