1221200230113 has 6 divisors (see below), whose sum is σ = 1763955887954. Its totient is φ = 814133486736.

The previous prime is 1221200230049. The next prime is 1221200230139. The reversal of 1221200230113 is 3110320021221.

1221200230113 is a `hidden beast` number, since 1 + 221 + 200 + 230 + 1 + 13 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1077325671249 + 143874558864 = 1037943^2 + 379308^2 .

It is not a de Polignac number, because 1221200230113 - 2⁶ = 1221200230049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1221200250113) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67844457220 + ... + 67844457237.

Almost surely, 2^{1221200230113} is an apocalyptic number.

It is an amenable number.

1221200230113 is a deficient number, since it is larger than the sum of its proper divisors (542755657841).

1221200230113 is a wasteful number, since it uses less digits than its factorization.

1221200230113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135688914463 (or 135688914460 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1221200230113 its reverse (3110320021221), we get a palindrome (4331520251334).

The spelling of 1221200230113 in words is "one trillion, two hundred twenty-one billion, two hundred million, two hundred thirty thousand, one hundred thirteen".