213111332331 has 16 divisors (see below), whose sum is σ = 288238464000. Its totient is φ = 140030432640.

The previous prime is 213111332327. The next prime is 213111332341. The reversal of 213111332331 is 133233111312.

It is not a de Polignac number, because 213111332331 - 2² = 213111332327 is a prime.

It is a super-2 number, since 2×213111332331² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (213111332311) 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, 554670 + ... + 856668.

It is an arithmetic number, because the mean of its divisors is an integer number (18014904000).

Almost surely, 2^213111332331 is an apocalyptic number.

213111332331 is a deficient number, since it is larger than the sum of its proper divisors (75127131669).

213111332331 is a wasteful number, since it uses less digits than its factorization.

213111332331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305386.

The product of its digits is 972, while the sum is 24.

Adding to 213111332331 its reverse (133233111312), we get a palindrome (346344443643).

The spelling of 213111332331 in words is "two hundred thirteen billion, one hundred eleven million, three hundred thirty-two thousand, three hundred thirty-one".