242135123212111 has 4 divisors (see below), whose sum is σ = 254879077065400. Its totient is φ = 229391169358824.

The previous prime is 242135123212097. The next prime is 242135123212117. The reversal of 242135123212111 is 111212321531242.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 242135123212111 - 2¹⁵ = 242135123179343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242135123212117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6371976926616 + ... + 6371976926653.

It is an arithmetic number, because the mean of its divisors is an integer number (63719769266350).

Almost surely, 2^{242135123212111} is an apocalyptic number.

242135123212111 is a deficient number, since it is larger than the sum of its proper divisors (12743953853289).

242135123212111 is a wasteful number, since it uses less digits than its factorization.

242135123212111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12743953853288.

The product of its digits is 5760, while the sum is 31.

Adding to 242135123212111 its reverse (111212321531242), we get a palindrome (353347444743353).

The spelling of 242135123212111 in words is "two hundred forty-two trillion, one hundred thirty-five billion, one hundred twenty-three million, two hundred twelve thousand, one hundred eleven".