1222201211 has 16 divisors (see below), whose sum is σ = 1526024448. Its totient is φ = 950964000.

The previous prime is 1222201157. The next prime is 1222201217. The reversal of 1222201211 is 1121022221.

It is a de Polignac number, because none of the positive numbers 2^k-1222201211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222201217) 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, 42656 + ... + 65298.

It is an arithmetic number, because the mean of its divisors is an integer number (95376528).

Almost surely, 2^1222201211 is an apocalyptic number.

1222201211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1222201211 is a deficient number, since it is larger than the sum of its proper divisors (303823237).

1222201211 is a wasteful number, since it uses less digits than its factorization.

1222201211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23362.

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

The square root of 1222201211 is about 34959.9944364984. The cubic root of 1222201211 is about 1069.1719832165.

Adding to 1222201211 its reverse (1121022221), we get a palindrome (2343223432).

The spelling of 1222201211 in words is "one billion, two hundred twenty-two million, two hundred one thousand, two hundred eleven".