1242223105423 has 4 divisors (see below), whose sum is σ = 1245553462648. Its totient is φ = 1238892748200.

The previous prime is 1242223105411. The next prime is 1242223105427. The reversal of 1242223105423 is 3245013222421.

It is a happy number.

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 1242223105423 - 2²¹ = 1242221008271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242223105427) 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, 1665178053 + ... + 1665178798.

It is an arithmetic number, because the mean of its divisors is an integer number (311388365662).

Almost surely, 2^{1242223105423} is an apocalyptic number.

1242223105423 is a deficient number, since it is larger than the sum of its proper divisors (3330357225).

1242223105423 is an equidigital number, since it uses as much as digits as its factorization.

1242223105423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3330357224.

The product of its (nonzero) digits is 23040, while the sum is 31.

Adding to 1242223105423 its reverse (3245013222421), we get a palindrome (4487236327844).

The spelling of 1242223105423 in words is "one trillion, two hundred forty-two billion, two hundred twenty-three million, one hundred five thousand, four hundred twenty-three".