228378501121 has 4 divisors (see below), whose sum is σ = 228759768000. Its totient is φ = 227997234244.

The previous prime is 228378501067. The next prime is 228378501149. The reversal of 228378501121 is 121105873822.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 121105873822 = 2 ⋅60552936911.

It is a cyclic number.

It is not a de Polignac number, because 228378501121 - 2⁷ = 228378500993 is a prime.

It is a super-3 number, since 3×228378501121³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228378501191) 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, 190632541 + ... + 190633738.

It is an arithmetic number, because the mean of its divisors is an integer number (57189942000).

Almost surely, 2^228378501121 is an apocalyptic number.

It is an amenable number.

228378501121 is a deficient number, since it is larger than the sum of its proper divisors (381266879).

228378501121 is an equidigital number, since it uses as much as digits as its factorization.

228378501121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381266878.

The product of its (nonzero) digits is 53760, while the sum is 40.

The spelling of 228378501121 in words is "two hundred twenty-eight billion, three hundred seventy-eight million, five hundred one thousand, one hundred twenty-one".