7222122212 has 6 divisors (see below), whose sum is σ = 12638713878. Its totient is φ = 3611061104.

The previous prime is 7222122211. The next prime is 7222122217. The reversal of 7222122212 is 2122212227.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 5476888036 + 1745234176 = 74006^2 + 41776^2 .

It is not an unprimeable number, because it can be changed into a prime (7222122211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 902765273 + ... + 902765280.

It is an arithmetic number, because the mean of its divisors is an integer number (2106452313).

Almost surely, 2^7222122212 is an apocalyptic number.

It is an amenable number.

7222122212 is a deficient number, since it is larger than the sum of its proper divisors (5416591666).

7222122212 is a wasteful number, since it uses less digits than its factorization.

7222122212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1805530557 (or 1805530555 counting only the distinct ones).

The product of its digits is 896, while the sum is 23.

The square root of 7222122212 is about 84983.0701492950. The cubic root of 7222122212 is about 1932.9544102273.

Adding to 7222122212 its reverse (2122212227), we get a palindrome (9344334439).

The spelling of 7222122212 in words is "seven billion, two hundred twenty-two million, one hundred twenty-two thousand, two hundred twelve".