123042240291 has 8 divisors (see below), whose sum is σ = 168057694224. Its totient is φ = 80027473280.

The previous prime is 123042240289. The next prime is 123042240311. The reversal of 123042240291 is 192042240321.

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

It is a cyclic number.

It is not a de Polignac number, because 123042240291 - 2¹ = 123042240289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123042240281) 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, 500171586 + ... + 500171831.

It is an arithmetic number, because the mean of its divisors is an integer number (21007211778).

Almost surely, 2^123042240291 is an apocalyptic number.

123042240291 is a deficient number, since it is larger than the sum of its proper divisors (45015453933).

123042240291 is a wasteful number, since it uses less digits than its factorization.

123042240291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000343461.

The product of its (nonzero) digits is 6912, while the sum is 30.

Adding to 123042240291 its sum of digits (30), we get a palindrome (123042240321).

The spelling of 123042240291 in words is "one hundred twenty-three billion, forty-two million, two hundred forty thousand, two hundred ninety-one".