1222204211 has 4 divisors (see below), whose sum is σ = 1222900800. Its totient is φ = 1221507624.

The previous prime is 1222204201. The next prime is 1222204229. The reversal of 1222204211 is 1124022221.

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 1222204211 - 2¹⁸ = 1221942067 is a prime.

It is a super-2 number, since 2×1222204211² = 2987566266772265042, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1222204211.

It is not an unprimeable number, because it can be changed into a prime (1222204201) 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, 345656 + ... + 349173.

It is an arithmetic number, because the mean of its divisors is an integer number (305725200).

Almost surely, 2^1222204211 is an apocalyptic number.

1222204211 is a deficient number, since it is larger than the sum of its proper divisors (696589).

1222204211 is an equidigital number, since it uses as much as digits as its factorization.

1222204211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696588.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 1222204211 is about 34960.0373426574. The cubic root of 1222204211 is about 1069.1728580079.

Adding to 1222204211 its reverse (1124022221), we get a palindrome (2346226432).

The spelling of 1222204211 in words is "one billion, two hundred twenty-two million, two hundred four thousand, two hundred eleven".