20021104201313 has 2 divisors, whose sum is σ = 20021104201314. Its totient is φ = 20021104201312.

The previous prime is 20021104201261. The next prime is 20021104201321. The reversal of 20021104201313 is 31310240112002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11069141929024 + 8951962272289 = 3327032^2 + 2991983^2 .

It is a cyclic number.

It is not a de Polignac number, because 20021104201313 - 2¹⁸ = 20021103939169 is a prime.

It is a super-2 number, since 2×20021104201313² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20021104201513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010552100656 + 10010552100657.

It is an arithmetic number, because the mean of its divisors is an integer number (10010552100657).

Almost surely, 2^{20021104201313} is an apocalyptic number.

It is an amenable number.

20021104201313 is a deficient number, since it is larger than the sum of its proper divisors (1).

20021104201313 is an equidigital number, since it uses as much as digits as its factorization.

20021104201313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 20021104201313 its reverse (31310240112002), we get a palindrome (51331344313315).

The spelling of 20021104201313 in words is "twenty trillion, twenty-one billion, one hundred four million, two hundred one thousand, three hundred thirteen".