1213222722 has 16 divisors (see below), whose sum is σ = 2531943360. Its totient is φ = 386824592.

The previous prime is 1213222721. The next prime is 1213222733. The reversal of 1213222722 is 2272223121.

It is a junction number, because it is equal to n+sod(n) for n = 1213222692 and 1213222701.

It is not an unprimeable number, because it can be changed into a prime (1213222721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4395597 + ... + 4395872.

It is an arithmetic number, because the mean of its divisors is an integer number (158246460).

Almost surely, 2^1213222722 is an apocalyptic number.

1213222722 is an abundant number, since it is smaller than the sum of its proper divisors (1318720638).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1213222722 is a wasteful number, since it uses less digits than its factorization.

1213222722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8791497.

The product of its digits is 1344, while the sum is 24.

The square root of 1213222722 is about 34831.3468301184. The cubic root of 1213222722 is about 1066.5474421215.

Adding to 1213222722 its reverse (2272223121), we get a palindrome (3485445843).

The spelling of 1213222722 in words is "one billion, two hundred thirteen million, two hundred twenty-two thousand, seven hundred twenty-two".