211222221212091 has 16 divisors (see below), whose sum is σ = 281909884048128. Its totient is φ = 140674690586400.

The previous prime is 211222221212077. The next prime is 211222221212099. The reversal of 211222221212091 is 190212122222112.

It is not a de Polignac number, because 211222221212091 - 2⁹ = 211222221211579 is a prime.

It is a super-2 number, since 2×211222221212091² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211222221212099) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 208044076 + ... + 209056886.

It is an arithmetic number, because the mean of its divisors is an integer number (17619367753008).

Almost surely, 2^{211222221212091} is an apocalyptic number.

211222221212091 is a deficient number, since it is larger than the sum of its proper divisors (70687662836037).

211222221212091 is a wasteful number, since it uses less digits than its factorization.

211222221212091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1081922.

The product of its (nonzero) digits is 2304, while the sum is 30.

The spelling of 211222221212091 in words is "two hundred eleven trillion, two hundred twenty-two billion, two hundred twenty-one million, two hundred twelve thousand, ninety-one".