242120313031 has 4 divisors (see below), whose sum is σ = 245185127200. Its totient is φ = 239055498864.

The previous prime is 242120312969. The next prime is 242120313037. The reversal of 242120313031 is 130313021242.

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 242120313031 - 2¹¹ = 242120310983 is a prime.

It is a super-2 number, since 2×242120313031² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 242120312993 and 242120313011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242120313037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1532406966 + ... + 1532407123.

It is an arithmetic number, because the mean of its divisors is an integer number (61296281800).

Almost surely, 2^242120313031 is an apocalyptic number.

242120313031 is a deficient number, since it is larger than the sum of its proper divisors (3064814169).

242120313031 is an equidigital number, since it uses as much as digits as its factorization.

242120313031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3064814168.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 242120313031 its reverse (130313021242), we get a palindrome (372433334273).

The spelling of 242120313031 in words is "two hundred forty-two billion, one hundred twenty million, three hundred thirteen thousand, thirty-one".