2131321213 has 16 divisors (see below), whose sum is σ = 2478116736. Its totient is φ = 1795288320.

The previous prime is 2131321211. The next prime is 2131321223. The reversal of 2131321213 is 3121231312.

It is not a de Polignac number, because 2131321213 - 2¹ = 2131321211 is a prime.

It is a super-2 number, since 2×2131321213² = 9085060225967582738, which 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 (2131321211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136170 + ... + 151012.

It is an arithmetic number, because the mean of its divisors is an integer number (154882296).

Almost surely, 2^2131321213 is an apocalyptic number.

It is an amenable number.

2131321213 is a deficient number, since it is larger than the sum of its proper divisors (346795523).

2131321213 is a wasteful number, since it uses less digits than its factorization.

2131321213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15204.

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

The square root of 2131321213 is about 46166.2345551378. The cubic root of 2131321213 is about 1286.9143269930.

Adding to 2131321213 its reverse (3121231312), we get a palindrome (5252552525).

The spelling of 2131321213 in words is "two billion, one hundred thirty-one million, three hundred twenty-one thousand, two hundred thirteen".