221450123 has 4 divisors (see below), whose sum is σ = 221484480. Its totient is φ = 221415768.

The previous prime is 221450093. The next prime is 221450137. The reversal of 221450123 is 321054122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321054122 = 2 ⋅160527061.

It is a cyclic number.

It is not a de Polignac number, because 221450123 - 2¹⁰ = 221449099 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221450095 and 221450104.

It is not an unprimeable number, because it can be changed into a prime (221450153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4283 + ... + 21476.

It is an arithmetic number, because the mean of its divisors is an integer number (55371120).

Almost surely, 2^221450123 is an apocalyptic number.

221450123 is a deficient number, since it is larger than the sum of its proper divisors (34357).

221450123 is an equidigital number, since it uses as much as digits as its factorization.

221450123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34356.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 221450123 is about 14881.2003212107. The cubic root of 221450123 is about 605.0045515674.

The spelling of 221450123 in words is "two hundred twenty-one million, four hundred fifty thousand, one hundred twenty-three".