210042991019 has 2 divisors, whose sum is σ = 210042991020. Its totient is φ = 210042991018.

The previous prime is 210042991007. The next prime is 210042991043. The reversal of 210042991019 is 910199240012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 210042991019 - 2¹⁶ = 210042925483 is a prime.

It is a super-2 number, since 2×210042991019² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (210042991079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105021495509 + 105021495510.

It is an arithmetic number, because the mean of its divisors is an integer number (105021495510).

Almost surely, 2^210042991019 is an apocalyptic number.

210042991019 is a deficient number, since it is larger than the sum of its proper divisors (1).

210042991019 is an equidigital number, since it uses as much as digits as its factorization.

210042991019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 38.

The spelling of 210042991019 in words is "two hundred ten billion, forty-two million, nine hundred ninety-one thousand, nineteen".