1222120211 has 4 divisors (see below), whose sum is σ = 1316129472. Its totient is φ = 1128110952.

The previous prime is 1222120189. The next prime is 1222120213. The reversal of 1222120211 is 1120212221.

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 1222120211 - 2³⁰ = 148378387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222120213) 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, 47004611 + ... + 47004636.

It is an arithmetic number, because the mean of its divisors is an integer number (329032368).

Almost surely, 2^1222120211 is an apocalyptic number.

1222120211 is a deficient number, since it is larger than the sum of its proper divisors (94009261).

1222120211 is an equidigital number, since it uses as much as digits as its factorization.

1222120211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94009260.

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

The square root of 1222120211 is about 34958.8359503002. The cubic root of 1222120211 is about 1069.1483633076.

Adding to 1222120211 its reverse (1120212221), we get a palindrome (2342332432).

The spelling of 1222120211 in words is "one billion, two hundred twenty-two million, one hundred twenty thousand, two hundred eleven".