1213371312 has 80 divisors (see below), whose sum is σ = 3331810560. Its totient is φ = 379420416.

The previous prime is 1213371301. The next prime is 1213371337. The reversal of 1213371312 is 2131733121.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 87478 + ... + 100394.

It is an arithmetic number, because the mean of its divisors is an integer number (41647632).

Almost surely, 2^1213371312 is an apocalyptic number.

1213371312 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 1213371312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1665905280).

1213371312 is an abundant number, since it is smaller than the sum of its proper divisors (2118439248).

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

1213371312 is a wasteful number, since it uses less digits than its factorization.

1213371312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13050 (or 13044 counting only the distinct ones).

The product of its digits is 756, while the sum is 24.

The square root of 1213371312 is about 34833.4797572680. The cubic root of 1213371312 is about 1066.5909823036.

The spelling of 1213371312 in words is "one billion, two hundred thirteen million, three hundred seventy-one thousand, three hundred twelve".