102221021101091 has 2 divisors, whose sum is σ = 102221021101092. Its totient is φ = 102221021101090.

The previous prime is 102221021101037. The next prime is 102221021101151. The reversal of 102221021101091 is 190101120122201.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 102221021101091 - 2⁴⁶ = 31852276923427 is a prime.

It is not a weakly prime, because it can be changed into another prime (102221021101891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51110510550545 + 51110510550546.

It is an arithmetic number, because the mean of its divisors is an integer number (51110510550546).

Almost surely, 2^{102221021101091} is an apocalyptic number.

102221021101091 is a deficient number, since it is larger than the sum of its proper divisors (1).

102221021101091 is an equidigital number, since it uses as much as digits as its factorization.

102221021101091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 23.

Adding to 102221021101091 its reverse (190101120122201), we get a palindrome (292322141223292).

The spelling of 102221021101091 in words is "one hundred two trillion, two hundred twenty-one billion, twenty-one million, one hundred one thousand, ninety-one".