2131000020231 has 4 divisors (see below), whose sum is σ = 2841333360312. Its totient is φ = 1420666680152.

The previous prime is 2131000020169. The next prime is 2131000020241. The reversal of 2131000020231 is 1320200001312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2131000020231 - 2⁹ = 2131000019719 is a prime.

It is a super-2 number, since 2×2131000020231² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2131000020231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131000020241) 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, 355166670036 + ... + 355166670041.

It is an arithmetic number, because the mean of its divisors is an integer number (710333340078).

Almost surely, 2^{2131000020231} is an apocalyptic number.

2131000020231 is a deficient number, since it is larger than the sum of its proper divisors (710333340081).

2131000020231 is an equidigital number, since it uses as much as digits as its factorization.

2131000020231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710333340080.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 2131000020231 its reverse (1320200001312), we get a palindrome (3451200021543).

The spelling of 2131000020231 in words is "two trillion, one hundred thirty-one billion, twenty thousand, two hundred thirty-one".