1222072001 has 12 divisors (see below), whose sum is σ = 1324650132. Its totient is φ = 1126449504.

The previous prime is 1222071989. The next prime is 1222072021. The reversal of 1222072001 is 1002702221.

It can be written as a sum of positive squares in 2 ways, for example, as 1163151025 + 58920976 = 34105^2 + 7676^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1222072001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1222072021) 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, 32390 + ... + 59103.

It is an arithmetic number, because the mean of its divisors is an integer number (110387511).

Almost surely, 2^1222072001 is an apocalyptic number.

It is an amenable number.

1222072001 is a deficient number, since it is larger than the sum of its proper divisors (102578131).

1222072001 is an equidigital number, since it uses as much as digits as its factorization.

1222072001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91568 (or 91549 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 1222072001 is about 34958.1464182528. The cubic root of 1222072001 is about 1069.1343045923.

Adding to 1222072001 its reverse (1002702221), we get a palindrome (2224774222).

The spelling of 1222072001 in words is "one billion, two hundred twenty-two million, seventy-two thousand, one".