121421023243 has 8 divisors (see below), whose sum is σ = 130781851200. Its totient is φ = 112063159488.

The previous prime is 121421023237. The next prime is 121421023253. The reversal of 121421023243 is 342320124121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121421023243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121421023253) 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, 655603 + ... + 820156.

It is an arithmetic number, because the mean of its divisors is an integer number (16347731400).

Almost surely, 2^121421023243 is an apocalyptic number.

121421023243 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

121421023243 is a deficient number, since it is larger than the sum of its proper divisors (9360827957).

121421023243 is a wasteful number, since it uses less digits than its factorization.

121421023243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1482101.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 121421023243 its reverse (342320124121), we get a palindrome (463741147364).

The spelling of 121421023243 in words is "one hundred twenty-one billion, four hundred twenty-one million, twenty-three thousand, two hundred forty-three".