211221222297 has 4 divisors (see below), whose sum is σ = 281628296400. Its totient is φ = 140814148196.

The previous prime is 211221222263. The next prime is 211221222347. The reversal of 211221222297 is 792222122112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 211221222297 - 2⁷ = 211221222169 is a prime.

It is a super-2 number, since 2×211221222297² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211221222097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35203537047 + ... + 35203537052.

It is an arithmetic number, because the mean of its divisors is an integer number (70407074100).

Almost surely, 2^211221222297 is an apocalyptic number.

It is an amenable number.

211221222297 is a deficient number, since it is larger than the sum of its proper divisors (70407074103).

211221222297 is an equidigital number, since it uses as much as digits as its factorization.

211221222297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70407074102.

The product of its digits is 8064, while the sum is 33.

The spelling of 211221222297 in words is "two hundred eleven billion, two hundred twenty-one million, two hundred twenty-two thousand, two hundred ninety-seven".