2131213311 has 6 divisors (see below), whose sum is σ = 3078419240. Its totient is φ = 1420808868.

The previous prime is 2131213297. The next prime is 2131213321. The reversal of 2131213311 is 1133121312.

2131213311 is a `hidden beast` number, since 21 + 312 + 1 + 331 + 1 = 666.

It is not a de Polignac number, because 2131213311 - 2¹¹ = 2131211263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131213321) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 118400731 + ... + 118400748.

Almost surely, 2^2131213311 is an apocalyptic number.

2131213311 is a deficient number, since it is larger than the sum of its proper divisors (947205929).

2131213311 is a wasteful number, since it uses less digits than its factorization.

2131213311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236801485 (or 236801482 counting only the distinct ones).

The product of its digits is 108, while the sum is 18.

The square root of 2131213311 is about 46165.0659156900. The cubic root of 2131213311 is about 1286.8926091696.

Adding to 2131213311 its reverse (1133121312), we get a palindrome (3264334623).

The spelling of 2131213311 in words is "two billion, one hundred thirty-one million, two hundred thirteen thousand, three hundred eleven".