21375072106229 has 2 divisors, whose sum is σ = 21375072106230. Its totient is φ = 21375072106228.

The previous prime is 21375072106207. The next prime is 21375072106303. The reversal of 21375072106229 is 92260127057312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15670498125604 + 5704573980625 = 3958598^2 + 2388425^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21375072106229 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21375072106429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10687536053114 + 10687536053115.

It is an arithmetic number, because the mean of its divisors is an integer number (10687536053115).

Almost surely, 2^{21375072106229} is an apocalyptic number.

It is an amenable number.

21375072106229 is a deficient number, since it is larger than the sum of its proper divisors (1).

21375072106229 is an equidigital number, since it uses as much as digits as its factorization.

21375072106229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 635040, while the sum is 47.

The spelling of 21375072106229 in words is "twenty-one trillion, three hundred seventy-five billion, seventy-two million, one hundred six thousand, two hundred twenty-nine".