1213311300 has 36 divisors (see below), whose sum is σ = 3510514896. Its totient is φ = 323549600.

The previous prime is 1213311293. The next prime is 1213311317. The reversal of 1213311300 is 31133121.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1213311300.

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 11 ways as a sum of consecutive naturals, for example, 2021886 + ... + 2022485.

Almost surely, 2^1213311300 is an apocalyptic number.

1213311300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213311300 is an abundant number, since it is smaller than the sum of its proper divisors (2297203596).

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

1213311300 is a wasteful number, since it uses less digits than its factorization.

1213311300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4044388 (or 4044381 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 1213311300 is about 34832.6183339697. The cubic root of 1213311300 is about 1066.5733978778.

Adding to 1213311300 its reverse (31133121), we get a palindrome (1244444421).

The spelling of 1213311300 in words is "one billion, two hundred thirteen million, three hundred eleven thousand, three hundred".