1221301110313 has 4 divisors (see below), whose sum is σ = 1221401981380. Its totient is φ = 1221200239248.

The previous prime is 1221301110221. The next prime is 1221301110343. The reversal of 1221301110313 is 3130111031221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1049993694864 + 171307415449 = 1024692^2 + 413893^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1221301110313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1221301110343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50417370 + ... + 50441587.

It is an arithmetic number, because the mean of its divisors is an integer number (305350495345).

Almost surely, 2^{1221301110313} is an apocalyptic number.

It is an amenable number.

1221301110313 is a deficient number, since it is larger than the sum of its proper divisors (100871067).

1221301110313 is a wasteful number, since it uses less digits than its factorization.

1221301110313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100871066.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 1221301110313 its reverse (3130111031221), we get a palindrome (4351412141534).

The spelling of 1221301110313 in words is "one trillion, two hundred twenty-one billion, three hundred one million, one hundred ten thousand, three hundred thirteen".