21023402219 has 2 divisors, whose sum is σ = 21023402220. Its totient is φ = 21023402218.

The previous prime is 21023402201. The next prime is 21023402221. The reversal of 21023402219 is 91220432012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21023402219 - 2¹⁶ = 21023336683 is a prime.

It is a super-2 number, since 2×21023402219² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 21023402221, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (21023402299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511701109 + 10511701110.

It is an arithmetic number, because the mean of its divisors is an integer number (10511701110).

Almost surely, 2^21023402219 is an apocalyptic number.

21023402219 is a deficient number, since it is larger than the sum of its proper divisors (1).

21023402219 is an equidigital number, since it uses as much as digits as its factorization.

21023402219 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 26.

The spelling of 21023402219 in words is "twenty-one billion, twenty-three million, four hundred two thousand, two hundred nineteen".