210421013240423 has 4 divisors (see below), whose sum is σ = 210422090634168. Its totient is φ = 210419935846680.

The previous prime is 210421013240419. The next prime is 210421013240513. The reversal of 210421013240423 is 324042310124012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 210421013240423 - 2² = 210421013240419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210421013240623) 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, 538403861 + ... + 538794542.

It is an arithmetic number, because the mean of its divisors is an integer number (52605522658542).

Almost surely, 2^{210421013240423} is an apocalyptic number.

210421013240423 is a deficient number, since it is larger than the sum of its proper divisors (1077393745).

210421013240423 is a wasteful number, since it uses less digits than its factorization.

210421013240423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1077393744.

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 210421013240423 its reverse (324042310124012), we get a palindrome (534463323364435).

The spelling of 210421013240423 in words is "two hundred ten trillion, four hundred twenty-one billion, thirteen million, two hundred forty thousand, four hundred twenty-three".