1231206912 has 480 divisors, whose sum is σ = 4313295360. Its totient is φ = 345047040.

The previous prime is 1231206901. The next prime is 1231206937. The reversal of 1231206912 is 2196021321.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 39716337 + ... + 39716367.

It is an arithmetic number, because the mean of its divisors is an integer number (8986032).

Almost surely, 2^1231206912 is an apocalyptic number.

1231206912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1231206912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2156647680).

1231206912 is an abundant number, since it is smaller than the sum of its proper divisors (3082088448).

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

1231206912 is a wasteful number, since it uses less digits than its factorization.

1231206912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101 (or 66 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 1231206912 is about 35088.5581350958. The cubic root of 1231206912 is about 1071.7915983092.

The spelling of 1231206912 in words is "one billion, two hundred thirty-one million, two hundred six thousand, nine hundred twelve".