42212999 has 2 divisors, whose sum is σ = 42213000. Its totient is φ = 42212998.

The previous prime is 42212987. The next prime is 42213013. The reversal of 42212999 is 99921224.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42212999 - 2²⁰ = 41164423 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42212299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21106499 + 21106500.

It is an arithmetic number, because the mean of its divisors is an integer number (21106500).

Almost surely, 2^42212999 is an apocalyptic number.

42212999 is a deficient number, since it is larger than the sum of its proper divisors (1).

42212999 is an equidigital number, since it uses as much as digits as its factorization.

42212999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 38.

The square root of 42212999 is about 6497.1531458016. The cubic root of 42212999 is about 348.1892852090.

The spelling of 42212999 in words is "forty-two million, two hundred twelve thousand, nine hundred ninety-nine".