421345222543123 has 2 divisors, whose sum is σ = 421345222543124. Its totient is φ = 421345222543122.

The previous prime is 421345222543117. The next prime is 421345222543207. The reversal of 421345222543123 is 321345222543124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421345222543123 - 2⁹ = 421345222542611 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 421345222543123.

It is not a weakly prime, because it can be changed into another prime (421345222543823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210672611271561 + 210672611271562.

It is an arithmetic number, because the mean of its divisors is an integer number (210672611271562).

Almost surely, 2^{421345222543123} is an apocalyptic number.

421345222543123 is a deficient number, since it is larger than the sum of its proper divisors (1).

421345222543123 is an equidigital number, since it uses as much as digits as its factorization.

421345222543123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1382400, while the sum is 43.

Subtracting from 421345222543123 its reverse (321345222543124), we obtain a palindrome (99999999999999).

The spelling of 421345222543123 in words is "four hundred twenty-one trillion, three hundred forty-five billion, two hundred twenty-two million, five hundred forty-three thousand, one hundred twenty-three".