220012111909 has 2 divisors, whose sum is σ = 220012111910. Its totient is φ = 220012111908.

The previous prime is 220012111901. The next prime is 220012111939. The reversal of 220012111909 is 909111210022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 219817509409 + 194602500 = 468847^2 + 13950^2 .

It is a cyclic number.

It is not a de Polignac number, because 220012111909 - 2³ = 220012111901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220012111901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110006055954 + 110006055955.

It is an arithmetic number, because the mean of its divisors is an integer number (110006055955).

Almost surely, 2^220012111909 is an apocalyptic number.

It is an amenable number.

220012111909 is a deficient number, since it is larger than the sum of its proper divisors (1).

220012111909 is an equidigital number, since it uses as much as digits as its factorization.

220012111909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 28.

The spelling of 220012111909 in words is "two hundred twenty billion, twelve million, one hundred eleven thousand, nine hundred nine".