120221111911 has 2 divisors, whose sum is σ = 120221111912. Its totient is φ = 120221111910.

The previous prime is 120221111909. The next prime is 120221111981. The reversal of 120221111911 is 119111122021.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (119111122021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 120221111911 - 2¹ = 120221111909 is a prime.

Together with 120221111909, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120221111981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60110555955 + 60110555956.

It is an arithmetic number, because the mean of its divisors is an integer number (60110555956).

Almost surely, 2^120221111911 is an apocalyptic number.

120221111911 is a deficient number, since it is larger than the sum of its proper divisors (1).

120221111911 is an equidigital number, since it uses as much as digits as its factorization.

120221111911 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 22.

Adding to 120221111911 its reverse (119111122021), we get a palindrome (239332233932).

The spelling of 120221111911 in words is "one hundred twenty billion, two hundred twenty-one million, one hundred eleven thousand, nine hundred eleven".