2130312122021 has 4 divisors (see below), whose sum is σ = 2166419107200. Its totient is φ = 2094205136844.

The previous prime is 2130312121997. The next prime is 2130312122033. The reversal of 2130312122021 is 1202212130312.

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 2130312122021 - 2⁶ = 2130312121957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2130312121984 and 2130312122002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2130312122221) 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, 18053492501 + ... + 18053492618.

It is an arithmetic number, because the mean of its divisors is an integer number (541604776800).

Almost surely, 2^{2130312122021} is an apocalyptic number.

It is an amenable number.

2130312122021 is a deficient number, since it is larger than the sum of its proper divisors (36106985179).

2130312122021 is an equidigital number, since it uses as much as digits as its factorization.

2130312122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36106985178.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 2130312122021 its reverse (1202212130312), we get a palindrome (3332524252333).

The spelling of 2130312122021 in words is "two trillion, one hundred thirty billion, three hundred twelve million, one hundred twenty-two thousand, twenty-one".