221120119991 has 2 divisors, whose sum is σ = 221120119992. Its totient is φ = 221120119990.

The previous prime is 221120119981. The next prime is 221120120017. The reversal of 221120119991 is 199911021122.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221120119991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221120119951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110560059995 + 110560059996.

It is an arithmetic number, because the mean of its divisors is an integer number (110560059996).

Almost surely, 2^221120119991 is an apocalyptic number.

221120119991 is a deficient number, since it is larger than the sum of its proper divisors (1).

221120119991 is an equidigital number, since it uses as much as digits as its factorization.

221120119991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 38.

The spelling of 221120119991 in words is "two hundred twenty-one billion, one hundred twenty million, one hundred nineteen thousand, nine hundred ninety-one".