102221121211091 has 2 divisors, whose sum is σ = 102221121211092. Its totient is φ = 102221121211090.

The previous prime is 102221121211067. The next prime is 102221121211117. The reversal of 102221121211091 is 190112121122201.

It is an a-pointer prime, because the next prime (102221121211117) can be obtained adding 102221121211091 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102221121211091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102221121211091.

It is not a weakly prime, because it can be changed into another prime (102221121211021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51110560605545 + 51110560605546.

It is an arithmetic number, because the mean of its divisors is an integer number (51110560605546).

Almost surely, 2^{102221121211091} is an apocalyptic number.

102221121211091 is a deficient number, since it is larger than the sum of its proper divisors (1).

102221121211091 is an equidigital number, since it uses as much as digits as its factorization.

102221121211091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 26.

Adding to 102221121211091 its reverse (190112121122201), we get a palindrome (292333242333292).

The spelling of 102221121211091 in words is "one hundred two trillion, two hundred twenty-one billion, one hundred twenty-one million, two hundred eleven thousand, ninety-one".