2131023221311 has 4 divisors (see below), whose sum is σ = 2140328999800. Its totient is φ = 2121717442824.

The previous prime is 2131023221303. The next prime is 2131023221339. The reversal of 2131023221311 is 1131223201312.

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 2131023221311 - 2³ = 2131023221303 is a prime.

It is a super-2 number, since 2×2131023221311² (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 (2131023225311) 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, 4652888901 + ... + 4652889358.

It is an arithmetic number, because the mean of its divisors is an integer number (535082249950).

Almost surely, 2^{2131023221311} is an apocalyptic number.

2131023221311 is a deficient number, since it is larger than the sum of its proper divisors (9305778489).

2131023221311 is an equidigital number, since it uses as much as digits as its factorization.

2131023221311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9305778488.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 2131023221311 its reverse (1131223201312), we get a palindrome (3262246422623).

The spelling of 2131023221311 in words is "two trillion, one hundred thirty-one billion, twenty-three million, two hundred twenty-one thousand, three hundred eleven".