228570640121 has 4 divisors (see below), whose sum is σ = 230239039092. Its totient is φ = 226902241152.

The previous prime is 228570640117. The next prime is 228570640163. The reversal of 228570640121 is 121046075822.

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

It can be written as a sum of positive squares in 2 ways, for example, as 136633729600 + 91936910521 = 369640^2 + 303211^2 .

It is a cyclic number.

It is not a de Polignac number, because 228570640121 - 2² = 228570640117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228570640171) 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, 834199280 + ... + 834199553.

It is an arithmetic number, because the mean of its divisors is an integer number (57559759773).

Almost surely, 2^228570640121 is an apocalyptic number.

It is an amenable number.

228570640121 is a deficient number, since it is larger than the sum of its proper divisors (1668398971).

228570640121 is a wasteful number, since it uses less digits than its factorization.

228570640121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1668398970.

The product of its (nonzero) digits is 53760, while the sum is 38.

The spelling of 228570640121 in words is "two hundred twenty-eight billion, five hundred seventy million, six hundred forty thousand, one hundred twenty-one".