202111201091 has 2 divisors, whose sum is σ = 202111201092. Its totient is φ = 202111201090.

The previous prime is 202111200919. The next prime is 202111201151. The reversal of 202111201091 is 190102111202.

202111201091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 202111201091 - 2¹⁴ = 202111184707 is a prime.

It is not a weakly prime, because it can be changed into another prime (202111206091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101055600545 + 101055600546.

It is an arithmetic number, because the mean of its divisors is an integer number (101055600546).

Almost surely, 2^202111201091 is an apocalyptic number.

202111201091 is a deficient number, since it is larger than the sum of its proper divisors (1).

202111201091 is an equidigital number, since it uses as much as digits as its factorization.

202111201091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 202111201091 its reverse (190102111202), we get a palindrome (392213312293).

The spelling of 202111201091 in words is "two hundred two billion, one hundred eleven million, two hundred one thousand, ninety-one".