101220221222191 has 2 divisors, whose sum is σ = 101220221222192. Its totient is φ = 101220221222190.

The previous prime is 101220221222143. The next prime is 101220221222203. The reversal of 101220221222191 is 191222122022101.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 101220221222191 - 2²⁵ = 101220187667759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101220221222111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50610110611095 + 50610110611096.

It is an arithmetic number, because the mean of its divisors is an integer number (50610110611096).

Almost surely, 2^{101220221222191} is an apocalyptic number.

101220221222191 is a deficient number, since it is larger than the sum of its proper divisors (1).

101220221222191 is an equidigital number, since it uses as much as digits as its factorization.

101220221222191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 28.

Adding to 101220221222191 its reverse (191222122022101), we get a palindrome (292442343244292).

The spelling of 101220221222191 in words is "one hundred one trillion, two hundred twenty billion, two hundred twenty-one million, two hundred twenty-two thousand, one hundred ninety-one".