1217021338 has 8 divisors (see below), whose sum is σ = 1965957588. Its totient is φ = 561702144.

The previous prime is 1217021293. The next prime is 1217021341. The reversal of 1217021338 is 8331207121.

It can be written as a sum of positive squares in 2 ways, for example, as 975125529 + 241895809 = 31227^2 + 15553^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1217021338² = 2962281874294620488, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23404231 + ... + 23404282.

Almost surely, 2^1217021338 is an apocalyptic number.

1217021338 is a deficient number, since it is larger than the sum of its proper divisors (748936250).

1217021338 is a wasteful number, since it uses less digits than its factorization.

1217021338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46808528.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 1217021338 is about 34885.8329125162. The cubic root of 1217021338 is about 1067.6594070041.

Adding to 1217021338 its reverse (8331207121), we get a palindrome (9548228459).

The spelling of 1217021338 in words is "one billion, two hundred seventeen million, twenty-one thousand, three hundred thirty-eight".