212121211021019 has 2 divisors, whose sum is σ = 212121211021020. Its totient is φ = 212121211021018.

The previous prime is 212121211020889. The next prime is 212121211021039. The reversal of 212121211021019 is 910120112121212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212121211021019 - 2²⁰ = 212121209972443 is a prime.

It is a super-2 number, since 2×212121211021019² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (212121211021039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106060605510509 + 106060605510510.

It is an arithmetic number, because the mean of its divisors is an integer number (106060605510510).

Almost surely, 2^{212121211021019} is an apocalyptic number.

212121211021019 is a deficient number, since it is larger than the sum of its proper divisors (1).

212121211021019 is an equidigital number, since it uses as much as digits as its factorization.

212121211021019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 26.

The spelling of 212121211021019 in words is "two hundred twelve trillion, one hundred twenty-one billion, two hundred eleven million, twenty-one thousand, nineteen".