212121010101019 has 2 divisors, whose sum is σ = 212121010101020. Its totient is φ = 212121010101018.

The previous prime is 212121010100969. The next prime is 212121010101029. The reversal of 212121010101019 is 910101010121212.

It is a happy number.

212121010101019 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212121010101019 - 2⁹ = 212121010100507 is a prime.

It is a super-3 number, since 3×212121010101019³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (212121010101029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106060505050509 + 106060505050510.

It is an arithmetic number, because the mean of its divisors is an integer number (106060505050510).

Almost surely, 2^{212121010101019} is an apocalyptic number.

212121010101019 is a deficient number, since it is larger than the sum of its proper divisors (1).

212121010101019 is an equidigital number, since it uses as much as digits as its factorization.

212121010101019 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 22.

The spelling of 212121010101019 in words is "two hundred twelve trillion, one hundred twenty-one billion, ten million, one hundred one thousand, nineteen".