122222211 has 32 divisors (see below), whose sum is σ = 177365760. Its totient is φ = 74680704.

The previous prime is 122222209. The next prime is 122222239. The reversal of 122222211 is 112222221.

It is not a de Polignac number, because 122222211 - 2¹ = 122222209 is a prime.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (122222201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 137976 + ... + 138858.

It is an arithmetic number, because the mean of its divisors is an integer number (5542680).

Almost surely, 2^122222211 is an apocalyptic number.

122222211 is a deficient number, since it is larger than the sum of its proper divisors (55143549).

122222211 is a wasteful number, since it uses less digits than its factorization.

122222211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995.

The product of its digits is 64, while the sum is 15.

The square root of 122222211 is about 11055.4154603072. The cubic root of 122222211 is about 496.2685024625.

Adding to 122222211 its reverse (112222221), we get a palindrome (234444432).

The spelling of 122222211 in words is "one hundred twenty-two million, two hundred twenty-two thousand, two hundred eleven".