221241123 has 24 divisors (see below), whose sum is σ = 323431680. Its totient is φ = 145724400.

The previous prime is 221241121. The next prime is 221241143. The reversal of 221241123 is 321142122.

It is a happy number.

It is not a de Polignac number, because 221241123 - 2¹ = 221241121 is a prime.

It is a super-2 number, since 2×221241123² = 97895269012602258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221241096 and 221241105.

It is not an unprimeable number, because it can be changed into a prime (221241121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 357108 + ... + 357726.

It is an arithmetic number, because the mean of its divisors is an integer number (13476320).

Almost surely, 2^221241123 is an apocalyptic number.

221241123 is a deficient number, since it is larger than the sum of its proper divisors (102190557).

221241123 is a wasteful number, since it uses less digits than its factorization.

221241123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1039 (or 1036 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 221241123 is about 14874.1763805597. The cubic root of 221241123 is about 604.8141614404.

Adding to 221241123 its reverse (321142122), we get a palindrome (542383245).

Subtracting 221241123 from its reverse (321142122), we obtain a palindrome (99900999).

The spelling of 221241123 in words is "two hundred twenty-one million, two hundred forty-one thousand, one hundred twenty-three".