11121232331 has 12 divisors (see below), whose sum is σ = 12279011136. Its totient is φ = 10064849520.

The previous prime is 11121232319. The next prime is 11121232379. The reversal of 11121232331 is 13323212111.

It is a happy number.

It is not a de Polignac number, because 11121232331 - 2¹⁸ = 11120970187 is a prime.

It is a super-4 number, since 4×11121232331⁴ (a number of 41 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11121232391) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 179096 + ... + 233061.

It is an arithmetic number, because the mean of its divisors is an integer number (1023250928).

Almost surely, 2^11121232331 is an apocalyptic number.

11121232331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11121232331 is a deficient number, since it is larger than the sum of its proper divisors (1157778805).

11121232331 is a wasteful number, since it uses less digits than its factorization.

11121232331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412402 (or 412391 counting only the distinct ones).

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

Adding to 11121232331 its reverse (13323212111), we get a palindrome (24444444442).

The spelling of 11121232331 in words is "eleven billion, one hundred twenty-one million, two hundred thirty-two thousand, three hundred thirty-one".