21021210001019 has 2 divisors, whose sum is σ = 21021210001020. Its totient is φ = 21021210001018.

The previous prime is 21021210001007. The next prime is 21021210001061. The reversal of 21021210001019 is 91010001212012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21021210001019 - 2³⁶ = 20952490524283 is a prime.

It is a super-2 number, since 2×21021210001019² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21021210001069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10510605000509 + 10510605000510.

It is an arithmetic number, because the mean of its divisors is an integer number (10510605000510).

Almost surely, 2^{21021210001019} is an apocalyptic number.

21021210001019 is a deficient number, since it is larger than the sum of its proper divisors (1).

21021210001019 is an equidigital number, since it uses as much as digits as its factorization.

21021210001019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 21021210001019 in words is "twenty-one trillion, twenty-one billion, two hundred ten million, one thousand, nineteen".