122212211 has 4 divisors (see below), whose sum is σ = 133322424. Its totient is φ = 111102000.

The previous prime is 122212193. The next prime is 122212213. The reversal of 122212211 is 112212221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 122212211 - 2¹⁸ = 121950067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122212213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5555090 + ... + 5555111.

It is an arithmetic number, because the mean of its divisors is an integer number (33330606).

Almost surely, 2^122212211 is an apocalyptic number.

122212211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

122212211 is a deficient number, since it is larger than the sum of its proper divisors (11110213).

122212211 is a wasteful number, since it uses less digits than its factorization.

122212211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11110212.

The product of its digits is 32, while the sum is 14.

The square root of 122212211 is about 11054.9631840183. The cubic root of 122212211 is about 496.2549674965.

Adding to 122212211 its reverse (112212221), we get a palindrome (234424432).

The spelling of 122212211 in words is "one hundred twenty-two million, two hundred twelve thousand, two hundred eleven".