1221113012300 has 72 divisors (see below), whose sum is σ = 2784917587200. Its totient is φ = 463847123520.

The previous prime is 1221113012269. The next prime is 1221113012341. The reversal of 1221113012300 is 32103111221.

It is a super-2 number, since 2×1221113012300² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1590080 + ... + 2229479.

Almost surely, 2^{1221113012300} is an apocalyptic number.

1221113012300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1221113012300 is an abundant number, since it is smaller than the sum of its proper divisors (1563804574900).

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

1221113012300 is a wasteful number, since it uses less digits than its factorization.

1221113012300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3819735 (or 3819728 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1221113012300 its reverse (32103111221), we get a palindrome (1253216123521).

The spelling of 1221113012300 in words is "one trillion, two hundred twenty-one billion, one hundred thirteen million, twelve thousand, three hundred".