1231201132 has 48 divisors (see below), whose sum is σ = 2720632320. Its totient is φ = 475022592.

The previous prime is 1231201123. The next prime is 1231201141. The reversal of 1231201132 is 2311021321.

It is an interprime number because it is at equal distance from previous prime (1231201123) and next prime (1231201141).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45282 + ... + 67177.

It is an arithmetic number, because the mean of its divisors is an integer number (56679840).

Almost surely, 2^1231201132 is an apocalyptic number.

It is an amenable number.

1231201132 is an abundant number, since it is smaller than the sum of its proper divisors (1489431188).

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

1231201132 is a wasteful number, since it uses less digits than its factorization.

1231201132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112510 (or 112508 counting only the distinct ones).

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

The square root of 1231201132 is about 35088.4757719682. The cubic root of 1231201132 is about 1071.7899211026.

Adding to 1231201132 its reverse (2311021321), we get a palindrome (3542222453).

The spelling of 1231201132 in words is "one billion, two hundred thirty-one million, two hundred one thousand, one hundred thirty-two".