211211102122091 has 2 divisors, whose sum is σ = 211211102122092. Its totient is φ = 211211102122090.

The previous prime is 211211102122079. The next prime is 211211102122147. The reversal of 211211102122091 is 190221201112112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211211102122091 - 2¹⁰ = 211211102121067 is a prime.

It is a super-2 number, since 2×211211102122091² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211211102122091.

It is not a weakly prime, because it can be changed into another prime (211211102122051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105605551061045 + 105605551061046.

It is an arithmetic number, because the mean of its divisors is an integer number (105605551061046).

Almost surely, 2^{211211102122091} is an apocalyptic number.

211211102122091 is a deficient number, since it is larger than the sum of its proper divisors (1).

211211102122091 is an equidigital number, since it uses as much as digits as its factorization.

211211102122091 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 26.

The spelling of 211211102122091 in words is "two hundred eleven trillion, two hundred eleven billion, one hundred two million, one hundred twenty-two thousand, ninety-one".