212101220999 has 2 divisors, whose sum is σ = 212101221000. Its totient is φ = 212101220998.

The previous prime is 212101220993. The next prime is 212101221049. The reversal of 212101220999 is 999022101212.

It is a happy number.

212101220999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212101220999 - 2²⁴ = 212084443783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212101220993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106050610499 + 106050610500.

It is an arithmetic number, because the mean of its divisors is an integer number (106050610500).

Almost surely, 2^212101220999 is an apocalyptic number.

212101220999 is a deficient number, since it is larger than the sum of its proper divisors (1).

212101220999 is an equidigital number, since it uses as much as digits as its factorization.

212101220999 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 212101220999 in words is "two hundred twelve billion, one hundred one million, two hundred twenty thousand, nine hundred ninety-nine".