1202221217 has 4 divisors (see below), whose sum is σ = 1204852356. Its totient is φ = 1199590080.

The previous prime is 1202221211. The next prime is 1202221259. The reversal of 1202221217 is 7121222021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 918332416 + 283888801 = 30304^2 + 16849^2 .

It is a cyclic number.

It is not a de Polignac number, because 1202221217 - 2²⁰ = 1201172641 is a prime.

It is a super-2 number, since 2×1202221217² = 2890671709209922178, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1202221211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1314884 + ... + 1315797.

It is an arithmetic number, because the mean of its divisors is an integer number (301213089).

Almost surely, 2^1202221217 is an apocalyptic number.

It is an amenable number.

1202221217 is a deficient number, since it is larger than the sum of its proper divisors (2631139).

1202221217 is an equidigital number, since it uses as much as digits as its factorization.

1202221217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2631138.

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 1202221217 is about 34673.0618348020. The cubic root of 1202221217 is about 1063.3138304048.

Adding to 1202221217 its reverse (7121222021), we get a palindrome (8323443238).

The spelling of 1202221217 in words is "one billion, two hundred two million, two hundred twenty-one thousand, two hundred seventeen".