2131223010031 has 4 divisors (see below), whose sum is σ = 2138753833672. Its totient is φ = 2123692186392.

The previous prime is 2131223009999. The next prime is 2131223010047. The reversal of 2131223010031 is 1300103221312.

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 2131223010031 - 2⁵ = 2131223009999 is a prime.

It is a super-2 number, since 2×2131223010031² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2131223009990 and 2131223010008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131223010331) 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, 3765411396 + ... + 3765411961.

It is an arithmetic number, because the mean of its divisors is an integer number (534688458418).

Almost surely, 2^{2131223010031} is an apocalyptic number.

2131223010031 is a deficient number, since it is larger than the sum of its proper divisors (7530823641).

2131223010031 is an equidigital number, since it uses as much as digits as its factorization.

2131223010031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7530823640.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 2131223010031 its reverse (1300103221312), we get a palindrome (3431326231343).

The spelling of 2131223010031 in words is "two trillion, one hundred thirty-one billion, two hundred twenty-three million, ten thousand, thirty-one".