212111202201091 has 2 divisors, whose sum is σ = 212111202201092. Its totient is φ = 212111202201090.

The previous prime is 212111202201089. The next prime is 212111202201193. The reversal of 212111202201091 is 190102202111212.

212111202201091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212111202201091 - 2¹ = 212111202201089 is a prime.

It is a super-2 number, since 2×212111202201091² (a number of 29 digits) contains 22 as substring.

Together with 212111202201089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (212111202201391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106055601100545 + 106055601100546.

It is an arithmetic number, because the mean of its divisors is an integer number (106055601100546).

Almost surely, 2^{212111202201091} is an apocalyptic number.

212111202201091 is a deficient number, since it is larger than the sum of its proper divisors (1).

212111202201091 is an equidigital number, since it uses as much as digits as its factorization.

212111202201091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 25.

The spelling of 212111202201091 in words is "two hundred twelve trillion, one hundred eleven billion, two hundred two million, two hundred one thousand, ninety-one".