221020100110111 has 2 divisors, whose sum is σ = 221020100110112. Its totient is φ = 221020100110110.

The previous prime is 221020100110109. The next prime is 221020100110127. The reversal of 221020100110111 is 111011001020122.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221020100110111 - 2¹ = 221020100110109 is a prime.

Together with 221020100110109, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 221020100110091 and 221020100110100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221020100114111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110510050055055 + 110510050055056.

It is an arithmetic number, because the mean of its divisors is an integer number (110510050055056).

Almost surely, 2^{221020100110111} is an apocalyptic number.

221020100110111 is a deficient number, since it is larger than the sum of its proper divisors (1).

221020100110111 is an equidigital number, since it uses as much as digits as its factorization.

221020100110111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 221020100110111 its reverse (111011001020122), we get a palindrome (332031101130233).

The spelling of 221020100110111 in words is "two hundred twenty-one trillion, twenty billion, one hundred million, one hundred ten thousand, one hundred eleven".