221013123 has 8 divisors (see below), whose sum is σ = 295691088. Its totient is φ = 146838624.

The previous prime is 221013119. The next prime is 221013151. The reversal of 221013123 is 321310122.

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

It is not a de Polignac number, because 221013123 - 2² = 221013119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221013103) 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, 124840 + ... + 126597.

It is an arithmetic number, because the mean of its divisors is an integer number (36961386).

Almost surely, 2^221013123 is an apocalyptic number.

221013123 is a deficient number, since it is larger than the sum of its proper divisors (74677965).

221013123 is a wasteful number, since it uses less digits than its factorization.

221013123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251733.

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

The square root of 221013123 is about 14866.5101150203. The cubic root of 221013123 is about 604.6063263203.

Adding to 221013123 its reverse (321310122), we get a palindrome (542323245).

The spelling of 221013123 in words is "two hundred twenty-one million, thirteen thousand, one hundred twenty-three".