212116999 has 2 divisors, whose sum is σ = 212117000. Its totient is φ = 212116998.

The previous prime is 212116987. The next prime is 212117011. The reversal of 212116999 is 999611212.

It is a balanced prime because it is at equal distance from previous prime (212116987) and next prime (212117011).

It is a cyclic number.

It is not a de Polignac number, because 212116999 - 2¹¹ = 212114951 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 (212116199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106058499 + 106058500.

It is an arithmetic number, because the mean of its divisors is an integer number (106058500).

Almost surely, 2^212116999 is an apocalyptic number.

212116999 is a deficient number, since it is larger than the sum of its proper divisors (1).

212116999 is an equidigital number, since it uses as much as digits as its factorization.

212116999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17496, while the sum is 40.

The square root of 212116999 is about 14564.2369865366. The cubic root of 212116999 is about 596.3828664314.

The spelling of 212116999 in words is "two hundred twelve million, one hundred sixteen thousand, nine hundred ninety-nine".