21992089211 has 2 divisors, whose sum is σ = 21992089212. Its totient is φ = 21992089210.

The previous prime is 21992089183. The next prime is 21992089237. The reversal of 21992089211 is 11298029912.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21992089211 - 2¹⁰ = 21992088187 is a prime.

It is not a weakly prime, because it can be changed into another prime (21992089411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10996044605 + 10996044606.

It is an arithmetic number, because the mean of its divisors is an integer number (10996044606).

Almost surely, 2^21992089211 is an apocalyptic number.

21992089211 is a deficient number, since it is larger than the sum of its proper divisors (1).

21992089211 is an equidigital number, since it uses as much as digits as its factorization.

21992089211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 44.

The spelling of 21992089211 in words is "twenty-one billion, nine hundred ninety-two million, eighty-nine thousand, two hundred eleven".