1231111132 has 12 divisors (see below), whose sum is σ = 2228735880. Its totient is φ = 594329456.

The previous prime is 1231111129. The next prime is 1231111171. The reversal of 1231111132 is 2311111321.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5306398 + ... + 5306629.

It is an arithmetic number, because the mean of its divisors is an integer number (185727990).

Almost surely, 2^1231111132 is an apocalyptic number.

It is an amenable number.

1231111132 is a deficient number, since it is larger than the sum of its proper divisors (997624748).

1231111132 is a wasteful number, since it uses less digits than its factorization.

1231111132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10613060 (or 10613058 counting only the distinct ones).

The product of its digits is 36, while the sum is 16.

The square root of 1231111132 is about 35087.1932761798. The cubic root of 1231111132 is about 1071.7638047514.

Adding to 1231111132 its reverse (2311111321), we get a palindrome (3542222453).

The spelling of 1231111132 in words is "one billion, two hundred thirty-one million, one hundred eleven thousand, one hundred thirty-two".