1213211300 has 36 divisors (see below), whose sum is σ = 3008765760. Its totient is φ = 415957920.

The previous prime is 1213211297. The next prime is 1213211323. The reversal of 1213211300 is 31123121.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 865880 + ... + 867279.

Almost surely, 2^1213211300 is an apocalyptic number.

1213211300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213211300 is an abundant number, since it is smaller than the sum of its proper divisors (1795554460).

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

1213211300 is a wasteful number, since it uses less digits than its factorization.

1213211300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1733180 (or 1733173 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1213211300 is about 34831.1828682289. The cubic root of 1213211300 is about 1066.5440950737.

Adding to 1213211300 its reverse (31123121), we get a palindrome (1244334421).

It can be divided in two parts, 12132 and 11300, that added together give a palindrome (23432).

The spelling of 1213211300 in words is "one billion, two hundred thirteen million, two hundred eleven thousand, three hundred".