221123030 has 16 divisors (see below), whose sum is σ = 400407840. Its totient is φ = 87918912.

The previous prime is 221123017. The next prime is 221123047. The reversal of 221123030 is 30321122.

It is a happy number.

221123030 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 221122996 and 221123014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64535 + ... + 67874.

It is an arithmetic number, because the mean of its divisors is an integer number (25025490).

Almost surely, 2^221123030 is an apocalyptic number.

221123030 is a deficient number, since it is larger than the sum of its proper divisors (179284810).

221123030 is a wasteful number, since it uses less digits than its factorization.

221123030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132583.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 221123030 is about 14870.2061182756. The cubic root of 221123030 is about 604.7065307104.

Adding to 221123030 its reverse (30321122), we get a palindrome (251444152).

The spelling of 221123030 in words is "two hundred twenty-one million, one hundred twenty-three thousand, thirty".