1213306512 has 80 divisors (see below), whose sum is σ = 3424001088. Its totient is φ = 367165440.

The previous prime is 1213306499. The next prime is 1213306513. The reversal of 1213306512 is 2156033121.

It is a super-2 number, since 2×1213306512² = 2944225384123212288, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (1213306513) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 607788 + ... + 609780.

Almost surely, 2^1213306512 is an apocalyptic number.

1213306512 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 1213306512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1712000544).

1213306512 is an abundant number, since it is smaller than the sum of its proper divisors (2210694576).

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

1213306512 is a wasteful number, since it uses less digits than its factorization.

1213306512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3168 (or 3162 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 1213306512 is about 34832.5496052184. The cubic root of 1213306512 is about 1066.5719948963.

Adding to 1213306512 its reverse (2156033121), we get a palindrome (3369339633).

The spelling of 1213306512 in words is "one billion, two hundred thirteen million, three hundred six thousand, five hundred twelve".