212220101999 has 2 divisors, whose sum is σ = 212220102000. Its totient is φ = 212220101998.

The previous prime is 212220101963. The next prime is 212220102001. The reversal of 212220101999 is 999101022212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212220101999 - 2³⁶ = 143500625263 is a prime.

Together with 212220102001, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212220101099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106110050999 + 106110051000.

It is an arithmetic number, because the mean of its divisors is an integer number (106110051000).

Almost surely, 2^212220101999 is an apocalyptic number.

212220101999 is a deficient number, since it is larger than the sum of its proper divisors (1).

212220101999 is an equidigital number, since it uses as much as digits as its factorization.

212220101999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 38.

The spelling of 212220101999 in words is "two hundred twelve billion, two hundred twenty million, one hundred one thousand, nine hundred ninety-nine".