321112131 has 16 divisors (see below), whose sum is σ = 456274944. Its totient is φ = 200408384.

The previous prime is 321112093. The next prime is 321112151. The reversal of 321112131 is 131211123.

It is a happy number.

It is not a de Polignac number, because 321112131 - 2⁶ = 321112067 is a prime.

It is a super-2 number, since 2×321112131² = 206226001350722322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 321112131.

It is not an unprimeable number, because it can be changed into a prime (321112151) 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, 46266 + ... + 52751.

It is an arithmetic number, because the mean of its divisors is an integer number (28517184).

Almost surely, 2^321112131 is an apocalyptic number.

321112131 is a deficient number, since it is larger than the sum of its proper divisors (135162813).

321112131 is a wasteful number, since it uses less digits than its factorization.

321112131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99090.

The product of its digits is 36, while the sum is 15.

The square root of 321112131 is about 17919.6018649969. The cubic root of 321112131 is about 684.7818446796.

Adding to 321112131 its reverse (131211123), we get a palindrome (452323254).

The spelling of 321112131 in words is "three hundred twenty-one million, one hundred twelve thousand, one hundred thirty-one".