121423142343 has 8 divisors (see below), whose sum is σ = 161899347456. Its totient is φ = 80947849400.

The previous prime is 121423142339. The next prime is 121423142359. The reversal of 121423142343 is 343241324121.

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

It is a cyclic number.

It is not a de Polignac number, because 121423142343 - 2² = 121423142339 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121423142343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121423144343) 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, 194308 + ... + 529718.

It is an arithmetic number, because the mean of its divisors is an integer number (20237418432).

Almost surely, 2^121423142343 is an apocalyptic number.

121423142343 is a deficient number, since it is larger than the sum of its proper divisors (40476205113).

121423142343 is a wasteful number, since it uses less digits than its factorization.

121423142343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456085.

The product of its digits is 13824, while the sum is 30.

Adding to 121423142343 its reverse (343241324121), we get a palindrome (464664466464).

The spelling of 121423142343 in words is "one hundred twenty-one billion, four hundred twenty-three million, one hundred forty-two thousand, three hundred forty-three".