220120111009 has 2 divisors, whose sum is σ = 220120111010. Its totient is φ = 220120111008.

The previous prime is 220120110967. The next prime is 220120111039. The reversal of 220120111009 is 900111021022.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 209823544225 + 10296566784 = 458065^2 + 101472^2 .

It is a cyclic number.

It is not a de Polignac number, because 220120111009 - 2²⁵ = 220086556577 is a prime.

It is a super-2 number, since 2×220120111009² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (220120111039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110060055504 + 110060055505.

It is an arithmetic number, because the mean of its divisors is an integer number (110060055505).

Almost surely, 2^220120111009 is an apocalyptic number.

It is an amenable number.

220120111009 is a deficient number, since it is larger than the sum of its proper divisors (1).

220120111009 is an equidigital number, since it uses as much as digits as its factorization.

220120111009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 220120111009 in words is "two hundred twenty billion, one hundred twenty million, one hundred eleven thousand, nine".