242120531213 has 16 divisors (see below), whose sum is σ = 279745202880. Its totient is φ = 207105235200.

The previous prime is 242120531209. The next prime is 242120531231. The reversal of 242120531213 is 312135021242.

It is a cyclic number.

It is not a de Polignac number, because 242120531213 - 2² = 242120531209 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242120531713) 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, 514823 + ... + 865611.

It is an arithmetic number, because the mean of its divisors is an integer number (17484075180).

Almost surely, 2^242120531213 is an apocalyptic number.

It is an amenable number.

242120531213 is a deficient number, since it is larger than the sum of its proper divisors (37624671667).

242120531213 is a wasteful number, since it uses less digits than its factorization.

242120531213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354508.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 242120531213 its reverse (312135021242), we get a palindrome (554255552455).

The spelling of 242120531213 in words is "two hundred forty-two billion, one hundred twenty million, five hundred thirty-one thousand, two hundred thirteen".