221200120111 has 2 divisors, whose sum is σ = 221200120112. Its totient is φ = 221200120110.

The previous prime is 221200120093. The next prime is 221200120117. The reversal of 221200120111 is 111021002122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221200120111 - 2²⁵ = 221166565679 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221200120091 and 221200120100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221200120117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110600060055 + 110600060056.

It is an arithmetic number, because the mean of its divisors is an integer number (110600060056).

Almost surely, 2^221200120111 is an apocalyptic number.

221200120111 is a deficient number, since it is larger than the sum of its proper divisors (1).

221200120111 is an equidigital number, since it uses as much as digits as its factorization.

221200120111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 221200120111 its reverse (111021002122), we get a palindrome (332221122233).

The spelling of 221200120111 in words is "two hundred twenty-one billion, two hundred million, one hundred twenty thousand, one hundred eleven".