2130404321021 has 4 divisors (see below), whose sum is σ = 2223030595872. Its totient is φ = 2037778046172.

The previous prime is 2130404321011. The next prime is 2130404321033. The reversal of 2130404321021 is 1201234040312.

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 2130404321021 - 2²² = 2130400126717 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 92626274827 = 2130404321021 / (2 + 1 + 3 + 0 + 4 + 0 + 4 + 3 + 2 + 1 + 0 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2130404321011) 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, 46313137391 + ... + 46313137436.

It is an arithmetic number, because the mean of its divisors is an integer number (555757648968).

Almost surely, 2^{2130404321021} is an apocalyptic number.

It is an amenable number.

2130404321021 is a deficient number, since it is larger than the sum of its proper divisors (92626274851).

2130404321021 is an equidigital number, since it uses as much as digits as its factorization.

2130404321021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92626274850.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 2130404321021 its reverse (1201234040312), we get a palindrome (3331638361333).

The spelling of 2130404321021 in words is "two trillion, one hundred thirty billion, four hundred four million, three hundred twenty-one thousand, twenty-one".