123858265221 has 12 divisors (see below), whose sum is σ = 178945479648. Its totient is φ = 82554132264.

The previous prime is 123858265213. The next prime is 123858265231. The reversal of 123858265221 is 122562858321.

123858265221 is a `hidden beast` number, since 1 + 2 + 3 + 8 + 582 + 65 + 2 + 2 + 1 = 666.

It is not a de Polignac number, because 123858265221 - 2³ = 123858265213 is a prime.

It is a super-3 number, since 3×123858265221³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123858265231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1460175 + ... + 1542668.

It is an arithmetic number, because the mean of its divisors is an integer number (14912123304).

Almost surely, 2^123858265221 is an apocalyptic number.

It is an amenable number.

123858265221 is a deficient number, since it is larger than the sum of its proper divisors (55087214427).

123858265221 is a wasteful number, since it uses less digits than its factorization.

123858265221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3007432 (or 3007429 counting only the distinct ones).

The product of its digits is 460800, while the sum is 45.

The spelling of 123858265221 in words is "one hundred twenty-three billion, eight hundred fifty-eight million, two hundred sixty-five thousand, two hundred twenty-one".