121342222243123 has 4 divisors (see below), whose sum is σ = 138676825420720. Its totient is φ = 104007619065528.

The previous prime is 121342222243097. The next prime is 121342222243133. The reversal of 121342222243123 is 321342222243121.

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 121342222243123 - 2²⁵ = 121342188688691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121342222243133) 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, 8667301588788 + ... + 8667301588801.

It is an arithmetic number, because the mean of its divisors is an integer number (34669206355180).

Almost surely, 2^{121342222243123} is an apocalyptic number.

121342222243123 is a deficient number, since it is larger than the sum of its proper divisors (17334603177597).

121342222243123 is an equidigital number, since it uses as much as digits as its factorization.

121342222243123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17334603177596.

The product of its digits is 55296, while the sum is 34.

Adding to 121342222243123 its reverse (321342222243121), we get a palindrome (442684444486244).

The spelling of 121342222243123 in words is "one hundred twenty-one trillion, three hundred forty-two billion, two hundred twenty-two million, two hundred forty-three thousand, one hundred twenty-three".