1231132120 has 32 divisors (see below), whose sum is σ = 2771067600. Its totient is φ = 492271488.

The previous prime is 1231132103. The next prime is 1231132121. The reversal of 1231132120 is 212311321.

It is a junction number, because it is equal to n+sod(n) for n = 1231132094 and 1231132103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231132121) 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, 176866 + ... + 183694.

Almost surely, 2^1231132120 is an apocalyptic number.

1231132120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231132120 is an abundant number, since it is smaller than the sum of its proper divisors (1539935480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1231132120 is a wasteful number, since it uses less digits than its factorization.

1231132120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11347 (or 11343 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1231132120 is about 35087.4923583889. The cubic root of 1231132120 is about 1071.7698951983.

Adding to 1231132120 its reverse (212311321), we get a palindrome (1443443441).

The spelling of 1231132120 in words is "one billion, two hundred thirty-one million, one hundred thirty-two thousand, one hundred twenty".