242113123221 has 16 divisors (see below), whose sum is σ = 339855579840. Its totient is φ = 152892092160.

The previous prime is 242113123211. The next prime is 242113123229. The reversal of 242113123221 is 122321311242.

It is not a de Polignac number, because 242113123221 - 2¹⁸ = 242112861077 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 242113123191 and 242113123200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242113123229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116701 + ... + 705581.

It is an arithmetic number, because the mean of its divisors is an integer number (21240973740).

Almost surely, 2^242113123221 is an apocalyptic number.

It is an amenable number.

242113123221 is a deficient number, since it is larger than the sum of its proper divisors (97742456619).

242113123221 is a wasteful number, since it uses less digits than its factorization.

242113123221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596116.

The product of its digits is 1152, while the sum is 24.

Adding to 242113123221 its reverse (122321311242), we get a palindrome (364434434463).

The spelling of 242113123221 in words is "two hundred forty-two billion, one hundred thirteen million, one hundred twenty-three thousand, two hundred twenty-one".