20121313233313 has 4 divisors (see below), whose sum is σ = 20121531091200. Its totient is φ = 20121095375428.

The previous prime is 20121313233227. The next prime is 20121313233319. The reversal of 20121313233313 is 31333231312102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20121313233313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20121313233319) 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, 108790345 + ... + 108975142.

It is an arithmetic number, because the mean of its divisors is an integer number (5030382772800).

Almost surely, 2^{20121313233313} is an apocalyptic number.

It is an amenable number.

20121313233313 is a deficient number, since it is larger than the sum of its proper divisors (217857887).

20121313233313 is an equidigital number, since it uses as much as digits as its factorization.

20121313233313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217857886.

The product of its (nonzero) digits is 5832, while the sum is 28.

Adding to 20121313233313 its reverse (31333231312102), we get a palindrome (51454544545415).

The spelling of 20121313233313 in words is "twenty trillion, one hundred twenty-one billion, three hundred thirteen million, two hundred thirty-three thousand, three hundred thirteen".