21096001 has 2 divisors, whose sum is σ = 21096002. Its totient is φ = 21096000.

The previous prime is 21095989. The next prime is 21096007. The reversal of 21096001 is 10069012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20711601 + 384400 = 4551^2 + 620^2 .

It is a cyclic number.

It is not a de Polignac number, because 21096001 - 2¹³ = 21087809 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21096001.

It is not a weakly prime, because it can be changed into another prime (21096007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10548000 + 10548001.

It is an arithmetic number, because the mean of its divisors is an integer number (10548001).

Almost surely, 2^21096001 is an apocalyptic number.

It is an amenable number.

21096001 is a deficient number, since it is larger than the sum of its proper divisors (1).

21096001 is an equidigital number, since it uses as much as digits as its factorization.

21096001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 21096001 is about 4593.0383190215. The cubic root of 21096001 is about 276.3121904987.

The spelling of 21096001 in words is "twenty-one million, ninety-six thousand, one".