316221121 has 8 divisors (see below), whose sum is σ = 323066880. Its totient is φ = 309446592.

The previous prime is 316221109. The next prime is 316221137. The reversal of 316221121 is 121122613.

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

It is a cyclic number.

It is not a de Polignac number, because 316221121 - 2²³ = 307832513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (316221821) 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 7 ways as a sum of consecutive naturals, for example, 8785 + ... + 26638.

It is an arithmetic number, because the mean of its divisors is an integer number (40383360).

Almost surely, 2^316221121 is an apocalyptic number.

It is an amenable number.

316221121 is a deficient number, since it is larger than the sum of its proper divisors (6845759).

316221121 is a wasteful number, since it uses less digits than its factorization.

316221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35615.

The product of its digits is 144, while the sum is 19.

The square root of 316221121 is about 17782.6072610290. The cubic root of 316221121 is about 681.2872969396.

Adding to 316221121 its reverse (121122613), we get a palindrome (437343734).

The spelling of 316221121 in words is "three hundred sixteen million, two hundred twenty-one thousand, one hundred twenty-one".