913221203113 has 4 divisors (see below), whose sum is σ = 913238085060. Its totient is φ = 913204321168.

The previous prime is 913221203099. The next prime is 913221203129. The reversal of 913221203113 is 311302122319.

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 707460985449 + 205760217664 = 841107^2 + 453608^2 .

It is a cyclic number.

It is not a de Polignac number, because 913221203113 - 2¹⁷ = 913221072041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (913221203183) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8359570 + ... + 8468107.

It is an arithmetic number, because the mean of its divisors is an integer number (228309521265).

Almost surely, 2^913221203113 is an apocalyptic number.

It is an amenable number.

913221203113 is a deficient number, since it is larger than the sum of its proper divisors (16881947).

913221203113 is a wasteful number, since it uses less digits than its factorization.

913221203113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16881946.

The product of its (nonzero) digits is 1944, while the sum is 28.

The spelling of 913221203113 in words is "nine hundred thirteen billion, two hundred twenty-one million, two hundred three thousand, one hundred thirteen".