1222211361 has 12 divisors (see below), whose sum is σ = 1895674992. Its totient is φ = 698406408.

The previous prime is 1222211303. The next prime is 1222211371. The reversal of 1222211361 is 1631122221.

It is not a de Polignac number, because 1222211361 - 2¹⁸ = 1221949217 is a prime.

It is a super-3 number, since 3×1222211361³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (1222211371) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4157035 + ... + 4157328.

It is an arithmetic number, because the mean of its divisors is an integer number (157972916).

Almost surely, 2^1222211361 is an apocalyptic number.

It is an amenable number.

1222211361 is a deficient number, since it is larger than the sum of its proper divisors (673463631).

1222211361 is an equidigital number, since it uses as much as digits as its factorization.

1222211361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8314380 (or 8314373 counting only the distinct ones).

The product of its digits is 288, while the sum is 21.

The square root of 1222211361 is about 34960.1396021240. The cubic root of 1222211361 is about 1069.1749429217.

Adding to 1222211361 its reverse (1631122221), we get a palindrome (2853333582).

The spelling of 1222211361 in words is "one billion, two hundred twenty-two million, two hundred eleven thousand, three hundred sixty-one".