2102323012021 has 4 divisors (see below), whose sum is σ = 2102900101312. Its totient is φ = 2101745922732.

The previous prime is 2102323011983. The next prime is 2102323012033. The reversal of 2102323012021 is 1202103232012.

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 2102323012021 - 2²³ = 2102314623413 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2102323012021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102323012921) 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, 288539181 + ... + 288546466.

It is an arithmetic number, because the mean of its divisors is an integer number (525725025328).

Almost surely, 2^{2102323012021} is an apocalyptic number.

It is an amenable number.

2102323012021 is a deficient number, since it is larger than the sum of its proper divisors (577089291).

2102323012021 is an equidigital number, since it uses as much as digits as its factorization.

2102323012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577089290.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 2102323012021 its reverse (1202103232012), we get a palindrome (3304426244033).

The spelling of 2102323012021 in words is "two trillion, one hundred two billion, three hundred twenty-three million, twelve thousand, twenty-one".