2162134356521 has 4 divisors (see below), whose sum is σ = 2289318730452. Its totient is φ = 2034949982592.

The previous prime is 2162134356511. The next prime is 2162134356533. The reversal of 2162134356521 is 1256534312612.

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 1960730868121 + 201403488400 = 1400261^2 + 448780^2 .

It is a cyclic number.

It is not a de Polignac number, because 2162134356521 - 2⁶ = 2162134356457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2162134356511) 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, 63592186940 + ... + 63592186973.

It is an arithmetic number, because the mean of its divisors is an integer number (572329682613).

Almost surely, 2^{2162134356521} is an apocalyptic number.

It is an amenable number.

2162134356521 is a deficient number, since it is larger than the sum of its proper divisors (127184373931).

2162134356521 is a wasteful number, since it uses less digits than its factorization.

2162134356521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127184373930.

The product of its digits is 259200, while the sum is 41.

The spelling of 2162134356521 in words is "two trillion, one hundred sixty-two billion, one hundred thirty-four million, three hundred fifty-six thousand, five hundred twenty-one".