1231213032 has 96 divisors (see below), whose sum is σ = 4035096000. Its totient is φ = 331080192.

The previous prime is 1231213007. The next prime is 1231213033. The reversal of 1231213032 is 2303121321.

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 = 1231212996 and 1231213014.

It is not an unprimeable number, because it can be changed into a prime (1231213033) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63282 + ... + 80417.

It is an arithmetic number, because the mean of its divisors is an integer number (42032250).

Almost surely, 2^1231213032 is an apocalyptic number.

1231213032 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1231213032 is an abundant number, since it is smaller than the sum of its proper divisors (2803882968).

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

1231213032 is a wasteful number, since it uses less digits than its factorization.

1231213032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143735 (or 143728 counting only the distinct ones).

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

The square root of 1231213032 is about 35088.6453429026. The cubic root of 1231213032 is about 1071.7933741693.

Adding to 1231213032 its reverse (2303121321), we get a palindrome (3534334353).

The spelling of 1231213032 in words is "one billion, two hundred thirty-one million, two hundred thirteen thousand, thirty-two".