11211232331 has 16 divisors (see below), whose sum is σ = 12413912448. Its totient is φ = 10059033600.

The previous prime is 11211232327. The next prime is 11211232337. The reversal of 11211232331 is 13323211211.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 11211232331 - 2² = 11211232327 is a prime.

It is a super-2 number, since 2×11211232331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11211232337) 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, 105635 + ... + 183251.

It is an arithmetic number, because the mean of its divisors is an integer number (775869528).

Almost surely, 2^11211232331 is an apocalyptic number.

11211232331 is a deficient number, since it is larger than the sum of its proper divisors (1202680117).

11211232331 is a wasteful number, since it uses less digits than its factorization.

11211232331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77942.

The product of its digits is 216, while the sum is 20.

Adding to 11211232331 its reverse (13323211211), we get a palindrome (24534443542).

The spelling of 11211232331 in words is "eleven billion, two hundred eleven million, two hundred thirty-two thousand, three hundred thirty-one".