2162021508321 has 4 divisors (see below), whose sum is σ = 2882695344432. Its totient is φ = 1441347672212.

The previous prime is 2162021508301. The next prime is 2162021508347. The reversal of 2162021508321 is 1238051202612.

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 2162021508321 - 2⁷ = 2162021508193 is a prime.

It is a super-2 number, since 2×2162021508321² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2162021508301) 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, 360336918051 + ... + 360336918056.

It is an arithmetic number, because the mean of its divisors is an integer number (720673836108).

Almost surely, 2^{2162021508321} is an apocalyptic number.

It is an amenable number.

2162021508321 is a deficient number, since it is larger than the sum of its proper divisors (720673836111).

2162021508321 is an equidigital number, since it uses as much as digits as its factorization.

2162021508321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720673836110.

The product of its (nonzero) digits is 11520, while the sum is 33.

The spelling of 2162021508321 in words is "two trillion, one hundred sixty-two billion, twenty-one million, five hundred eight thousand, three hundred twenty-one".