21002101319 has 2 divisors, whose sum is σ = 21002101320. Its totient is φ = 21002101318.

The previous prime is 21002101303. The next prime is 21002101349. The reversal of 21002101319 is 91310120012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21002101319 - 2⁴ = 21002101303 is a prime.

It is a super-2 number, since 2×21002101319² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21002101319.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21002101349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501050659 + 10501050660.

It is an arithmetic number, because the mean of its divisors is an integer number (10501050660).

Almost surely, 2^21002101319 is an apocalyptic number.

21002101319 is a deficient number, since it is larger than the sum of its proper divisors (1).

21002101319 is an equidigital number, since it uses as much as digits as its factorization.

21002101319 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 20.

The spelling of 21002101319 in words is "twenty-one billion, two million, one hundred one thousand, three hundred nineteen".