1222021672 has 16 divisors (see below), whose sum is σ = 2312313300. Its totient is φ = 605404800.

The previous prime is 1222021621. The next prime is 1222021673. The reversal of 1222021672 is 2761202221.

It can be written as a sum of positive squares in 2 ways, for example, as 1206450756 + 15570916 = 34734^2 + 3946^2 .

It is not an unprimeable number, because it can be changed into a prime (1222021673) 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, 699829 + ... + 701572.

Almost surely, 2^1222021672 is an apocalyptic number.

It is an amenable number.

1222021672 is a deficient number, since it is larger than the sum of its proper divisors (1090291628).

1222021672 is a wasteful number, since it uses less digits than its factorization.

1222021672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1401516 (or 1401512 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 1222021672 is about 34957.4265643225. The cubic root of 1222021672 is about 1069.1196275522.

Adding to 1222021672 its reverse (2761202221), we get a palindrome (3983223893).

The spelling of 1222021672 in words is "one billion, two hundred twenty-two million, twenty-one thousand, six hundred seventy-two".