2131200032021 has 4 divisors (see below), whose sum is σ = 2131203061344. Its totient is φ = 2131197002700.

The previous prime is 2131200031969. The next prime is 2131200032053. The reversal of 2131200032021 is 1202300021312.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2131200032021 - 2²² = 2131195837717 is a prime.

It is a super-2 number, since 2×2131200032021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131200032921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151736 + ... + 2070126.

It is an arithmetic number, because the mean of its divisors is an integer number (532800765336).

Almost surely, 2^{2131200032021} is an apocalyptic number.

It is an amenable number.

2131200032021 is a deficient number, since it is larger than the sum of its proper divisors (3029323).

2131200032021 is a wasteful number, since it uses less digits than its factorization.

2131200032021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3029322.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 2131200032021 its reverse (1202300021312), we get a palindrome (3333500053333).

The spelling of 2131200032021 in words is "two trillion, one hundred thirty-one billion, two hundred million, thirty-two thousand, twenty-one".