421343423121 has 4 divisors (see below), whose sum is σ = 561791230832. Its totient is φ = 280895615412.

The previous prime is 421343423117. The next prime is 421343423159. The reversal of 421343423121 is 121324343124.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 421343423121 - 2² = 421343423117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421343423021) 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, 70223903851 + ... + 70223903856.

It is an arithmetic number, because the mean of its divisors is an integer number (140447807708).

Almost surely, 2^421343423121 is an apocalyptic number.

It is an amenable number.

421343423121 is a deficient number, since it is larger than the sum of its proper divisors (140447807711).

421343423121 is a wasteful number, since it uses less digits than its factorization.

421343423121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140447807710.

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

Adding to 421343423121 its reverse (121324343124), we get a palindrome (542667766245).

The spelling of 421343423121 in words is "four hundred twenty-one billion, three hundred forty-three million, four hundred twenty-three thousand, one hundred twenty-one".