21202020000919 has 2 divisors, whose sum is σ = 21202020000920. Its totient is φ = 21202020000918.

The previous prime is 21202020000901. The next prime is 21202020001067. The reversal of 21202020000919 is 91900002020212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21202020000919 is a prime.

It is a super-2 number, since 2×21202020000919² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21202020000619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601010000459 + 10601010000460.

It is an arithmetic number, because the mean of its divisors is an integer number (10601010000460).

Almost surely, 2^{21202020000919} is an apocalyptic number.

21202020000919 is a deficient number, since it is larger than the sum of its proper divisors (1).

21202020000919 is an equidigital number, since it uses as much as digits as its factorization.

21202020000919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 28.

The spelling of 21202020000919 in words is "twenty-one trillion, two hundred two billion, twenty million, nine hundred nineteen", and thus it is an aban number.