21326440146101 has 2 divisors, whose sum is σ = 21326440146102. Its totient is φ = 21326440146100.

The previous prime is 21326440146031. The next prime is 21326440146127. The reversal of 21326440146101 is 10164104462312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20404427299876 + 922012846225 = 4517126^2 + 960215^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21326440146101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21326440146301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10663220073050 + 10663220073051.

It is an arithmetic number, because the mean of its divisors is an integer number (10663220073051).

Almost surely, 2^{21326440146101} is an apocalyptic number.

It is an amenable number.

21326440146101 is a deficient number, since it is larger than the sum of its proper divisors (1).

21326440146101 is an equidigital number, since it uses as much as digits as its factorization.

21326440146101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 35.

The spelling of 21326440146101 in words is "twenty-one trillion, three hundred twenty-six billion, four hundred forty million, one hundred forty-six thousand, one hundred one".