228100772123 has 4 divisors (see below), whose sum is σ = 260686596720. Its totient is φ = 195514947528.

The previous prime is 228100772089. The next prime is 228100772149. The reversal of 228100772123 is 321277001822.

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

It is a cyclic number.

It is not a de Polignac number, because 228100772123 - 2⁸ = 228100771867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228100772173) 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, 16292912288 + ... + 16292912301.

It is an arithmetic number, because the mean of its divisors is an integer number (65171649180).

Almost surely, 2^228100772123 is an apocalyptic number.

228100772123 is a deficient number, since it is larger than the sum of its proper divisors (32585824597).

228100772123 is an equidigital number, since it uses as much as digits as its factorization.

228100772123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32585824596.

The product of its (nonzero) digits is 18816, while the sum is 35.

Adding to 228100772123 its reverse (321277001822), we get a palindrome (549377773945).

The spelling of 228100772123 in words is "two hundred twenty-eight billion, one hundred million, seven hundred seventy-two thousand, one hundred twenty-three".