20121223313 has 8 divisors (see below), whose sum is σ = 20169265536. Its totient is φ = 20073240000.

The previous prime is 20121223249. The next prime is 20121223327. The reversal of 20121223313 is 31332212102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20121223313 - 2⁶ = 20121223249 is a prime.

It is a super-2 number, since 2×20121223313² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20121223013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 711188 + ... + 738938.

It is an arithmetic number, because the mean of its divisors is an integer number (2521158192).

Almost surely, 2^20121223313 is an apocalyptic number.

It is an amenable number.

20121223313 is a deficient number, since it is larger than the sum of its proper divisors (48042223).

20121223313 is an equidigital number, since it uses as much as digits as its factorization.

20121223313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29455.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 20121223313 its reverse (31332212102), we get a palindrome (51453435415).

The spelling of 20121223313 in words is "twenty billion, one hundred twenty-one million, two hundred twenty-three thousand, three hundred thirteen".