242140111221 has 16 divisors (see below), whose sum is σ = 326995522560. Its totient is φ = 159356411760.

The previous prime is 242140111219. The next prime is 242140111253. The reversal of 242140111221 is 122111041242.

It is not a de Polignac number, because 242140111221 - 2¹ = 242140111219 is a prime.

It is a super-2 number, since 2×242140111221² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242140111121) 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, 1369726 + ... + 1536368.

It is an arithmetic number, because the mean of its divisors is an integer number (20437220160).

Almost surely, 2^242140111221 is an apocalyptic number.

It is an amenable number.

242140111221 is a deficient number, since it is larger than the sum of its proper divisors (84855411339).

242140111221 is a wasteful number, since it uses less digits than its factorization.

242140111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172856.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 242140111221 its reverse (122111041242), we get a palindrome (364251152463).

The spelling of 242140111221 in words is "two hundred forty-two billion, one hundred forty million, one hundred eleven thousand, two hundred twenty-one".