242043312021 has 12 divisors (see below), whose sum is σ = 375414116832. Its totient is φ = 138310463928.

The previous prime is 242043312001. The next prime is 242043312023. The reversal of 242043312021 is 120213340242.

It is a happy number.

It is not a de Polignac number, because 242043312021 - 2⁵ = 242043311989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 242043311982 and 242043312000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242043312023) 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 11 ways as a sum of consecutive naturals, for example, 823276425 + ... + 823276718.

It is an arithmetic number, because the mean of its divisors is an integer number (31284509736).

Almost surely, 2^242043312021 is an apocalyptic number.

242043312021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

242043312021 is a deficient number, since it is larger than the sum of its proper divisors (133370804811).

242043312021 is a wasteful number, since it uses less digits than its factorization.

242043312021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1646553160 (or 1646553153 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 242043312021 its reverse (120213340242), we get a palindrome (362256652263).

The spelling of 242043312021 in words is "two hundred forty-two billion, forty-three million, three hundred twelve thousand, twenty-one".