1221231300113 has 32 divisors (see below), whose sum is σ = 1343411308800. Its totient is φ = 1100961792000.

The previous prime is 1221231300109. The next prime is 1221231300131. The reversal of 1221231300113 is 3110031321221.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1221231300113 - 2² = 1221231300109 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1221231300613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1151018603 + ... + 1151019663.

It is an arithmetic number, because the mean of its divisors is an integer number (41981603400).

Almost surely, 2^{1221231300113} is an apocalyptic number.

It is an amenable number.

1221231300113 is a deficient number, since it is larger than the sum of its proper divisors (122180008687).

1221231300113 is a wasteful number, since it uses less digits than its factorization.

1221231300113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2729.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1221231300113 its reverse (3110031321221), we get a palindrome (4331262621334).

The spelling of 1221231300113 in words is "one trillion, two hundred twenty-one billion, two hundred thirty-one million, three hundred thousand, one hundred thirteen".