213111231131 has 8 divisors (see below), whose sum is σ = 214571796000. Its totient is φ = 211651070400.

The previous prime is 213111231127. The next prime is 213111231139. The reversal of 213111231131 is 131132111312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213111231131 - 2² = 213111231127 is a prime.

It is a super-2 number, since 2×213111231131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213111231139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 998015 + ... + 1192583.

It is an arithmetic number, because the mean of its divisors is an integer number (26821474500).

Almost surely, 2^213111231131 is an apocalyptic number.

213111231131 is a deficient number, since it is larger than the sum of its proper divisors (1460564869).

213111231131 is a wasteful number, since it uses less digits than its factorization.

213111231131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202069.

The product of its digits is 108, while the sum is 20.

Adding to 213111231131 its reverse (131132111312), we get a palindrome (344243342443).

The spelling of 213111231131 in words is "two hundred thirteen billion, one hundred eleven million, two hundred thirty-one thousand, one hundred thirty-one".