220405460123 has 4 divisors (see below), whose sum is σ = 222014259240. Its totient is φ = 218796661008.

The previous prime is 220405460059. The next prime is 220405460129. The reversal of 220405460123 is 321064504022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321064504022 = 2 ⋅160532252011.

It is a cyclic number.

It is not a de Polignac number, because 220405460123 - 2⁶ = 220405460059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220405460129) 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, 804399353 + ... + 804399626.

It is an arithmetic number, because the mean of its divisors is an integer number (55503564810).

Almost surely, 2^220405460123 is an apocalyptic number.

220405460123 is a deficient number, since it is larger than the sum of its proper divisors (1608799117).

220405460123 is a wasteful number, since it uses less digits than its factorization.

220405460123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1608799116.

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 220405460123 its reverse (321064504022), we get a palindrome (541469964145).

The spelling of 220405460123 in words is "two hundred twenty billion, four hundred five million, four hundred sixty thousand, one hundred twenty-three".