21023112320201 has 2 divisors, whose sum is σ = 21023112320202. Its totient is φ = 21023112320200.

The previous prime is 21023112320149. The next prime is 21023112320237. The reversal of 21023112320201 is 10202321132012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21011002418176 + 12109902025 = 4583776^2 + 110045^2 .

It is a cyclic number.

It is not a de Polignac number, because 21023112320201 - 2²² = 21023108125897 is a prime.

It is not a weakly prime, because it can be changed into another prime (21023112320261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511556160100 + 10511556160101.

It is an arithmetic number, because the mean of its divisors is an integer number (10511556160101).

Almost surely, 2^{21023112320201} is an apocalyptic number.

It is an amenable number.

21023112320201 is a deficient number, since it is larger than the sum of its proper divisors (1).

21023112320201 is an equidigital number, since it uses as much as digits as its factorization.

21023112320201 is an odious number, because the sum of its binary digits is odd.

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

Adding to 21023112320201 its reverse (10202321132012), we get a palindrome (31225433452213).

The spelling of 21023112320201 in words is "twenty-one trillion, twenty-three billion, one hundred twelve million, three hundred twenty thousand, two hundred one".