1231332120 has 48 divisors (see below), whose sum is σ = 4001830560. Its totient is φ = 328355136.

The previous prime is 1231332119. The next prime is 1231332169. The reversal of 1231332120 is 212331321.

1231332120 is a `hidden beast` number, since 12 + 313 + 321 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1231332093 and 1231332102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1709824 + ... + 1710543.

It is an arithmetic number, because the mean of its divisors is an integer number (83371470).

Almost surely, 2^1231332120 is an apocalyptic number.

1231332120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231332120 is an abundant number, since it is smaller than the sum of its proper divisors (2770498440).

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

1231332120 is a wasteful number, since it uses less digits than its factorization.

1231332120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3420384 (or 3420377 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1231332120 is about 35090.3422610837. The cubic root of 1231332120 is about 1071.8279291464.

Adding to 1231332120 its reverse (212331321), we get a palindrome (1443663441).

The spelling of 1231332120 in words is "one billion, two hundred thirty-one million, three hundred thirty-two thousand, one hundred twenty".