1202121222191 has 2 divisors, whose sum is σ = 1202121222192. Its totient is φ = 1202121222190.

The previous prime is 1202121222187. The next prime is 1202121222319. The reversal of 1202121222191 is 1912221212021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1202121222191 - 2² = 1202121222187 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1202121222191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1202121222101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601060611095 + 601060611096.

It is an arithmetic number, because the mean of its divisors is an integer number (601060611096).

Almost surely, 2^{1202121222191} is an apocalyptic number.

1202121222191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1202121222191 is an equidigital number, since it uses as much as digits as its factorization.

1202121222191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 26.

The spelling of 1202121222191 in words is "one trillion, two hundred two billion, one hundred twenty-one million, two hundred twenty-two thousand, one hundred ninety-one".