1222100100191 has 2 divisors, whose sum is σ = 1222100100192. Its totient is φ = 1222100100190.

The previous prime is 1222100100173. The next prime is 1222100100211. The reversal of 1222100100191 is 1910010012221.

It is an a-pointer prime, because the next prime (1222100100211) can be obtained adding 1222100100191 to its sum of digits (20).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1222100100191 - 2¹⁴ = 1222100083807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222100100101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611050050095 + 611050050096.

It is an arithmetic number, because the mean of its divisors is an integer number (611050050096).

Almost surely, 2^{1222100100191} is an apocalyptic number.

1222100100191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222100100191 is an equidigital number, since it uses as much as digits as its factorization.

1222100100191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 1222100100191 in words is "one trillion, two hundred twenty-two billion, one hundred million, one hundred thousand, one hundred ninety-one".