20001321121319 has 2 divisors, whose sum is σ = 20001321121320. Its totient is φ = 20001321121318.

The previous prime is 20001321121273. The next prime is 20001321121321. The reversal of 20001321121319 is 91312112310002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20001321121319 - 2¹² = 20001321117223 is a prime.

It is a super-2 number, since 2×20001321121319² (a number of 27 digits) contains 22 as substring.

Together with 20001321121321, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20001321121349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000660560659 + 10000660560660.

It is an arithmetic number, because the mean of its divisors is an integer number (10000660560660).

Almost surely, 2^{20001321121319} is an apocalyptic number.

20001321121319 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001321121319 is an equidigital number, since it uses as much as digits as its factorization.

20001321121319 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 26.

The spelling of 20001321121319 in words is "twenty trillion, one billion, three hundred twenty-one million, one hundred twenty-one thousand, three hundred nineteen".