221941121 has 8 divisors (see below), whose sum is σ = 230091264. Its totient is φ = 213852960.

The previous prime is 221941091. The next prime is 221941151. The reversal of 221941121 is 121149122.

It is an interprime number because it is at equal distance from previous prime (221941091) and next prime (221941151).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221941121 is a prime.

It is a super-2 number, since 2×221941121² = 98515722381473282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221941151) 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, 8141 + ... + 22586.

It is an arithmetic number, because the mean of its divisors is an integer number (28761408).

Almost surely, 2^221941121 is an apocalyptic number.

It is an amenable number.

221941121 is a deficient number, since it is larger than the sum of its proper divisors (8150143).

221941121 is a wasteful number, since it uses less digits than its factorization.

221941121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30991.

The product of its digits is 288, while the sum is 23.

The square root of 221941121 is about 14897.6884448561. The cubic root of 221941121 is about 605.4513591031.

The spelling of 221941121 in words is "two hundred twenty-one million, nine hundred forty-one thousand, one hundred twenty-one".