21022300291 has 2 divisors, whose sum is σ = 21022300292. Its totient is φ = 21022300290.

The previous prime is 21022300279. The next prime is 21022300307. The reversal of 21022300291 is 19200322012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21022300291 - 2¹³ = 21022292099 is a prime.

It is not a weakly prime, because it can be changed into another prime (21022300231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511150145 + 10511150146.

It is an arithmetic number, because the mean of its divisors is an integer number (10511150146).

Almost surely, 2^21022300291 is an apocalyptic number.

21022300291 is a deficient number, since it is larger than the sum of its proper divisors (1).

21022300291 is an equidigital number, since it uses as much as digits as its factorization.

21022300291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The spelling of 21022300291 in words is "twenty-one billion, twenty-two million, three hundred thousand, two hundred ninety-one".