121213422343 has 4 divisors (see below), whose sum is σ = 130537531768. Its totient is φ = 111889312920.

The previous prime is 121213422311. The next prime is 121213422353. The reversal of 121213422343 is 343224312121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 343224312121 = 43 ⋅7981960747.

It is a cyclic number.

It is not a de Polignac number, because 121213422343 - 2⁵ = 121213422311 is a prime.

It is a super-2 number, since 2×121213422343² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121213422353) 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, 4662054693 + ... + 4662054718.

It is an arithmetic number, because the mean of its divisors is an integer number (32634382942).

Almost surely, 2^121213422343 is an apocalyptic number.

121213422343 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

121213422343 is a deficient number, since it is larger than the sum of its proper divisors (9324109425).

121213422343 is an equidigital number, since it uses as much as digits as its factorization.

121213422343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9324109424.

The product of its digits is 6912, while the sum is 28.

Adding to 121213422343 its reverse (343224312121), we get a palindrome (464437734464).

The spelling of 121213422343 in words is "one hundred twenty-one billion, two hundred thirteen million, four hundred twenty-two thousand, three hundred forty-three".