20001212123313 has 16 divisors (see below), whose sum is σ = 27105839079552. Its totient is φ = 13115369280000.

The previous prime is 20001212123287. The next prime is 20001212123339. The reversal of 20001212123313 is 31332121210002.

It is an interprime number because it is at equal distance from previous prime (20001212123287) and next prime (20001212123339).

It is not a de Polignac number, because 20001212123313 - 2⁵ = 20001212123281 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20001212123313.

It is not an unprimeable number, because it can be changed into a prime (20001212123363) 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, 13373788 + ... + 14793938.

It is an arithmetic number, because the mean of its divisors is an integer number (1694114942472).

Almost surely, 2^{20001212123313} is an apocalyptic number.

It is an amenable number.

20001212123313 is a deficient number, since it is larger than the sum of its proper divisors (7104626956239).

20001212123313 is a wasteful number, since it uses less digits than its factorization.

20001212123313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1497176.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 20001212123313 its reverse (31332121210002), we get a palindrome (51333333333315).

The spelling of 20001212123313 in words is "twenty trillion, one billion, two hundred twelve million, one hundred twenty-three thousand, three hundred thirteen".