212121319 has 2 divisors, whose sum is σ = 212121320. Its totient is φ = 212121318.

The previous prime is 212121289. The next prime is 212121379. The reversal of 212121319 is 913121212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212121319 - 2¹⁹ = 211597031 is a prime.

It is a super-2 number, since 2×212121319² = 89990907948599522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 212121319.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212121379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106060659 + 106060660.

It is an arithmetic number, because the mean of its divisors is an integer number (106060660).

Almost surely, 2^212121319 is an apocalyptic number.

212121319 is a deficient number, since it is larger than the sum of its proper divisors (1).

212121319 is an equidigital number, since it uses as much as digits as its factorization.

212121319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216, while the sum is 22.

The square root of 212121319 is about 14564.3852942718. The cubic root of 212121319 is about 596.3869150720.

The spelling of 212121319 in words is "two hundred twelve million, one hundred twenty-one thousand, three hundred nineteen".