1213013321 has 16 divisors (see below), whose sum is σ = 1331904000. Its totient is φ = 1097972928.

The previous prime is 1213013309. The next prime is 1213013327. The reversal of 1213013321 is 1233103121.

It is a de Polignac number, because none of the positive numbers 2^k-1213013321 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 1213013321.

It is not an unprimeable number, because it can be changed into a prime (1213013327) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 149060 + ... + 156986.

It is an arithmetic number, because the mean of its divisors is an integer number (83244000).

Almost surely, 2^1213013321 is an apocalyptic number.

It is an amenable number.

1213013321 is a deficient number, since it is larger than the sum of its proper divisors (118890679).

1213013321 is a wasteful number, since it uses less digits than its factorization.

1213013321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8168.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1213013321 is about 34828.3407729969. The cubic root of 1213013321 is about 1066.4860769252.

Adding to 1213013321 its reverse (1233103121), we get a palindrome (2446116442).

The spelling of 1213013321 in words is "one billion, two hundred thirteen million, thirteen thousand, three hundred twenty-one".