2100201232021 has 4 divisors (see below), whose sum is σ = 2121852791212. Its totient is φ = 2078549672832.

The previous prime is 2100201231991. The next prime is 2100201232037. The reversal of 2100201232021 is 1202321020012.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1101210976996 + 998990255025 = 1049386^2 + 999495^2 .

It is a cyclic number.

It is not a de Polignac number, because 2100201232021 - 2²⁵ = 2100167677589 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2100201231986 and 2100201232004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100201232091) 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, 10825779450 + ... + 10825779643.

It is an arithmetic number, because the mean of its divisors is an integer number (530463197803).

Almost surely, 2^{2100201232021} is an apocalyptic number.

It is an amenable number.

2100201232021 is a deficient number, since it is larger than the sum of its proper divisors (21651559191).

2100201232021 is an equidigital number, since it uses as much as digits as its factorization.

2100201232021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21651559190.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 2100201232021 its reverse (1202321020012), we get a palindrome (3302522252033).

The spelling of 2100201232021 in words is "two trillion, one hundred billion, two hundred one million, two hundred thirty-two thousand, twenty-one".