11231231331 has 8 divisors (see below), whose sum is σ = 15491353680. Its totient is φ = 7229298272.

The previous prime is 11231231321. The next prime is 11231231359. The reversal of 11231231331 is 13313213211.

It is a happy number.

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 11231231331 - 2¹⁹ = 11230707043 is a prime.

It is a super-2 number, since 2×11231231331² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11231231298 and 11231231307.

It is not an unprimeable number, because it can be changed into a prime (11231231321) 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, 64547220 + ... + 64547393.

It is an arithmetic number, because the mean of its divisors is an integer number (1936419210).

Almost surely, 2^11231231331 is an apocalyptic number.

11231231331 is a deficient number, since it is larger than the sum of its proper divisors (4260122349).

11231231331 is a wasteful number, since it uses less digits than its factorization.

11231231331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129094645.

The product of its digits is 324, while the sum is 21.

Adding to 11231231331 its reverse (13313213211), we get a palindrome (24544444542).

The spelling of 11231231331 in words is "eleven billion, two hundred thirty-one million, two hundred thirty-one thousand, three hundred thirty-one".