1213311226 has 12 divisors (see below), whose sum is σ = 1902537882. Its totient is φ = 580278776.

The previous prime is 1213311217. The next prime is 1213311227. The reversal of 1213311226 is 6221133121.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1056185001 + 157126225 = 32499^2 + 12535^2 .

It is a super-2 number, since 2×1213311226² = 2944248262275246152, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1213311197 and 1213311206.

It is not an unprimeable number, because it can be changed into a prime (1213311227) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 572341 + ... + 574456.

Almost surely, 2^1213311226 is an apocalyptic number.

1213311226 is a deficient number, since it is larger than the sum of its proper divisors (689226656).

1213311226 is a wasteful number, since it uses less digits than its factorization.

1213311226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1146845 (or 1146822 counting only the distinct ones).

The product of its digits is 432, while the sum is 22.

The square root of 1213311226 is about 34832.6172717469. The cubic root of 1213311226 is about 1066.5733761944.

Adding to 1213311226 its reverse (6221133121), we get a palindrome (7434444347).

The spelling of 1213311226 in words is "one billion, two hundred thirteen million, three hundred eleven thousand, two hundred twenty-six".