20211113222291 has 2 divisors, whose sum is σ = 20211113222292. Its totient is φ = 20211113222290.

The previous prime is 20211113222273. The next prime is 20211113222347. The reversal of 20211113222291 is 19222231111202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20211113222291 - 2¹⁸ = 20211112960147 is a prime.

It is not a weakly prime, because it can be changed into another prime (20211113222791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105556611145 + 10105556611146.

It is an arithmetic number, because the mean of its divisors is an integer number (10105556611146).

Almost surely, 2^{20211113222291} is an apocalyptic number.

20211113222291 is a deficient number, since it is larger than the sum of its proper divisors (1).

20211113222291 is an equidigital number, since it uses as much as digits as its factorization.

20211113222291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 29.

Adding to 20211113222291 its reverse (19222231111202), we get a palindrome (39433344333493).

The spelling of 20211113222291 in words is "twenty trillion, two hundred eleven billion, one hundred thirteen million, two hundred twenty-two thousand, two hundred ninety-one".