221120331 has 8 divisors (see below), whose sum is σ = 304993680. Its totient is φ = 142330272.

The previous prime is 221120299. The next prime is 221120351. The reversal of 221120331 is 133021122.

221120331 is nontrivially palindromic in base 2.

221120331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 221120331 - 2⁵ = 221120299 is a prime.

It is a super-2 number, since 2×221120331² = 97788401563099122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221120331.

It is not an unprimeable number, because it can be changed into a prime (221120351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1270720 + ... + 1270893.

It is an arithmetic number, because the mean of its divisors is an integer number (38124210).

Almost surely, 2^221120331 is an apocalyptic number.

221120331 is a deficient number, since it is larger than the sum of its proper divisors (83873349).

221120331 is a wasteful number, since it uses less digits than its factorization.

221120331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2541645.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 221120331 is about 14870.1153660622. The cubic root of 221120331 is about 604.7040703763.

Adding to 221120331 its reverse (133021122), we get a palindrome (354141453).

The spelling of 221120331 in words is "two hundred twenty-one million, one hundred twenty thousand, three hundred thirty-one".