1221310013 has 8 divisors (see below), whose sum is σ = 1522672320. Its totient is φ = 951670080.

The previous prime is 1221310001. The next prime is 1221310033. The reversal of 1221310013 is 3100131221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1221310013 - 2⁴ = 1221309997 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1221310013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221310033) 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 7 ways as a sum of consecutive naturals, for example, 7930508 + ... + 7930661.

It is an arithmetic number, because the mean of its divisors is an integer number (190334040).

Almost surely, 2^1221310013 is an apocalyptic number.

It is an amenable number.

1221310013 is a deficient number, since it is larger than the sum of its proper divisors (301362307).

1221310013 is a wasteful number, since it uses less digits than its factorization.

1221310013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15861187.

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

The square root of 1221310013 is about 34947.2461432943. The cubic root of 1221310013 is about 1068.9120490325.

Adding to 1221310013 its reverse (3100131221), we get a palindrome (4321441234).

It can be divided in two parts, 1221 and 310013, that multiplied together give a palindrome (378525873).

The spelling of 1221310013 in words is "one billion, two hundred twenty-one million, three hundred ten thousand, thirteen".