1242122242243 has 4 divisors (see below), whose sum is σ = 1244297588248. Its totient is φ = 1239946896240.

The previous prime is 1242122242219. The next prime is 1242122242271. The reversal of 1242122242243 is 3422422212421.

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 1242122242243 - 2¹⁷ = 1242122111171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242122242843) 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, 1087672146 + ... + 1087673287.

It is an arithmetic number, because the mean of its divisors is an integer number (311074397062).

Almost surely, 2^{1242122242243} is an apocalyptic number.

1242122242243 is a deficient number, since it is larger than the sum of its proper divisors (2175346005).

1242122242243 is an equidigital number, since it uses as much as digits as its factorization.

1242122242243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2175346004.

The product of its digits is 24576, while the sum is 31.

Adding to 1242122242243 its reverse (3422422212421), we get a palindrome (4664544454664).

The spelling of 1242122242243 in words is "one trillion, two hundred forty-two billion, one hundred twenty-two million, two hundred forty-two thousand, two hundred forty-three".