20203221000313 has 4 divisors (see below), whose sum is σ = 21757314923428. Its totient is φ = 18649127077200.

The previous prime is 20203221000289. The next prime is 20203221000323. The reversal of 20203221000313 is 31300012230202.

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 5430167593984 + 14773053406329 = 2330272^2 + 3843573^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20203221000313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20203221000323) 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, 777046961538 + ... + 777046961563.

It is an arithmetic number, because the mean of its divisors is an integer number (5439328730857).

Almost surely, 2^{20203221000313} is an apocalyptic number.

It is an amenable number.

20203221000313 is a deficient number, since it is larger than the sum of its proper divisors (1554093923115).

20203221000313 is a wasteful number, since it uses less digits than its factorization.

20203221000313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1554093923114.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 20203221000313 its reverse (31300012230202), we get a palindrome (51503233230515).

The spelling of 20203221000313 in words is "twenty trillion, two hundred three billion, two hundred twenty-one million, three hundred thirteen", and thus it is an aban number.