220342400123 has 4 divisors (see below), whose sum is σ = 221304594240. Its totient is φ = 219380206008.

The previous prime is 220342400093. The next prime is 220342400153. The reversal of 220342400123 is 321004243022.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (220342400093) and next prime (220342400153).

It is a cyclic number.

It is not a de Polignac number, because 220342400123 - 2⁸ = 220342399867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220342400153) 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, 481096715 + ... + 481097172.

It is an arithmetic number, because the mean of its divisors is an integer number (55326148560).

Almost surely, 2^220342400123 is an apocalyptic number.

220342400123 is a deficient number, since it is larger than the sum of its proper divisors (962194117).

220342400123 is an equidigital number, since it uses as much as digits as its factorization.

220342400123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 962194116.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 220342400123 its reverse (321004243022), we get a palindrome (541346643145).

The spelling of 220342400123 in words is "two hundred twenty billion, three hundred forty-two million, four hundred thousand, one hundred twenty-three".