212421019 has 2 divisors, whose sum is σ = 212421020. Its totient is φ = 212421018.

The previous prime is 212420983. The next prime is 212421029. The reversal of 212421019 is 910124212.

212421019 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 212421019 - 2⁷ = 212420891 is a prime.

It is a super-2 number, since 2×212421019² = 90245378625996722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (212421029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106210509 + 106210510.

It is an arithmetic number, because the mean of its divisors is an integer number (106210510).

Almost surely, 2^212421019 is an apocalyptic number.

212421019 is a deficient number, since it is larger than the sum of its proper divisors (1).

212421019 is an equidigital number, since it uses as much as digits as its factorization.

212421019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 212421019 is about 14574.6704593963. The cubic root of 212421019 is about 596.6676554329.

The spelling of 212421019 in words is "two hundred twelve million, four hundred twenty-one thousand, nineteen".