212403331109 has 2 divisors, whose sum is σ = 212403331110. Its totient is φ = 212403331108.

The previous prime is 212403331103. The next prime is 212403331159. The reversal of 212403331109 is 901133304212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 165185344900 + 47217986209 = 406430^2 + 217297^2 .

It is a cyclic number.

It is not a de Polignac number, because 212403331109 - 2¹² = 212403327013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212403331103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106201665554 + 106201665555.

It is an arithmetic number, because the mean of its divisors is an integer number (106201665555).

Almost surely, 2^212403331109 is an apocalyptic number.

It is an amenable number.

212403331109 is a deficient number, since it is larger than the sum of its proper divisors (1).

212403331109 is an equidigital number, since it uses as much as digits as its factorization.

212403331109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 29.

The spelling of 212403331109 in words is "two hundred twelve billion, four hundred three million, three hundred thirty-one thousand, one hundred nine".