242431123221 has 12 divisors (see below), whose sum is σ = 400203759072. Its totient is φ = 138532070376.

The previous prime is 242431123217. The next prime is 242431123229. The reversal of 242431123221 is 122321134242.

242431123221 is a `hidden beast` number, since 2 + 4 + 2 + 431 + 1 + 2 + 3 + 221 = 666.

It is not a de Polignac number, because 242431123221 - 2² = 242431123217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242431123229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1924056471 + ... + 1924056596.

It is an arithmetic number, because the mean of its divisors is an integer number (33350313256).

Almost surely, 2^242431123221 is an apocalyptic number.

242431123221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

242431123221 is a deficient number, since it is larger than the sum of its proper divisors (157772635851).

242431123221 is a wasteful number, since it uses less digits than its factorization.

242431123221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3848113080 (or 3848113077 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

Adding to 242431123221 its reverse (122321134242), we get a palindrome (364752257463).

The spelling of 242431123221 in words is "two hundred forty-two billion, four hundred thirty-one million, one hundred twenty-three thousand, two hundred twenty-one".