1223221013 has 16 divisors (see below), whose sum is σ = 1437350400. Its totient is φ = 1019239296.

The previous prime is 1223220997. The next prime is 1223221031. The reversal of 1223221013 is 3101223221.

It is a cyclic number.

It is not a de Polignac number, because 1223221013 - 2⁴ = 1223220997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1223220982 and 1223221000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223221093) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36545 + ... + 61497.

It is an arithmetic number, because the mean of its divisors is an integer number (89834400).

Almost surely, 2^1223221013 is an apocalyptic number.

It is an amenable number.

1223221013 is a deficient number, since it is larger than the sum of its proper divisors (214129387).

1223221013 is a wasteful number, since it uses less digits than its factorization.

1223221013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25156.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1223221013 is about 34974.5766664873. The cubic root of 1223221013 is about 1069.4692721292.

Adding to 1223221013 its reverse (3101223221), we get a palindrome (4324444234).

The spelling of 1223221013 in words is "one billion, two hundred twenty-three million, two hundred twenty-one thousand, thirteen".