221200120100291 has 2 divisors, whose sum is σ = 221200120100292. Its totient is φ = 221200120100290.

The previous prime is 221200120100287. The next prime is 221200120100317. The reversal of 221200120100291 is 192001021002122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221200120100291 - 2² = 221200120100287 is a prime.

It is not a weakly prime, because it can be changed into another prime (221200120108291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110600060050145 + 110600060050146.

It is an arithmetic number, because the mean of its divisors is an integer number (110600060050146).

Almost surely, 2^{221200120100291} is an apocalyptic number.

221200120100291 is a deficient number, since it is larger than the sum of its proper divisors (1).

221200120100291 is an equidigital number, since it uses as much as digits as its factorization.

221200120100291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 23.

The spelling of 221200120100291 in words is "two hundred twenty-one trillion, two hundred billion, one hundred twenty million, one hundred thousand, two hundred ninety-one".