28318210121 has 8 divisors (see below), whose sum is σ = 29557429440. Its totient is φ = 27079656912.

The previous prime is 28318210111. The next prime is 28318210127. The reversal of 28318210121 is 12101281382.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28318210121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28318210127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78650 + ... + 250643.

It is an arithmetic number, because the mean of its divisors is an integer number (3694678680).

Almost surely, 2^28318210121 is an apocalyptic number.

It is an amenable number.

28318210121 is a deficient number, since it is larger than the sum of its proper divisors (1239219319).

28318210121 is a wasteful number, since it uses less digits than its factorization.

28318210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333055.

The product of its (nonzero) digits is 1536, while the sum is 29.

The spelling of 28318210121 in words is "twenty-eight billion, three hundred eighteen million, two hundred ten thousand, one hundred twenty-one".