21152067191 has 2 divisors, whose sum is σ = 21152067192. Its totient is φ = 21152067190.

The previous prime is 21152067163. The next prime is 21152067203. The reversal of 21152067191 is 19176025112.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21152067191 - 2⁶ = 21152067127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21152067151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10576033595 + 10576033596.

It is an arithmetic number, because the mean of its divisors is an integer number (10576033596).

Almost surely, 2^21152067191 is an apocalyptic number.

21152067191 is a deficient number, since it is larger than the sum of its proper divisors (1).

21152067191 is an equidigital number, since it uses as much as digits as its factorization.

21152067191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 35.

The spelling of 21152067191 in words is "twenty-one billion, one hundred fifty-two million, sixty-seven thousand, one hundred ninety-one".