1242021412243 has 8 divisors (see below), whose sum is σ = 1263400839360. Its totient is φ = 1220652925800.

The previous prime is 1242021412231. The next prime is 1242021412369. The reversal of 1242021412243 is 3422141202421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1242021412243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242021472243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2506005 + ... + 2960422.

It is an arithmetic number, because the mean of its divisors is an integer number (157925104920).

Almost surely, 2^{1242021412243} is an apocalyptic number.

1242021412243 is a deficient number, since it is larger than the sum of its proper divisors (21379427117).

1242021412243 is an equidigital number, since it uses as much as digits as its factorization.

1242021412243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5470337.

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 1242021412243 its reverse (3422141202421), we get a palindrome (4664162614664).

The spelling of 1242021412243 in words is "one trillion, two hundred forty-two billion, twenty-one million, four hundred twelve thousand, two hundred forty-three".