421105405413613 has 4 divisors (see below), whose sum is σ = 434689450749568. Its totient is φ = 407521360077660.

The previous prime is 421105405413571. The next prime is 421105405413697. The reversal of 421105405413613 is 316314504501124.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421105405413613 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 (421105405413113) 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, 6792022667931 + ... + 6792022667992.

It is an arithmetic number, because the mean of its divisors is an integer number (108672362687392).

Almost surely, 2^{421105405413613} is an apocalyptic number.

It is an amenable number.

421105405413613 is a deficient number, since it is larger than the sum of its proper divisors (13584045335955).

421105405413613 is a wasteful number, since it uses less digits than its factorization.

421105405413613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13584045335954.

The product of its (nonzero) digits is 172800, while the sum is 40.

Adding to 421105405413613 its reverse (316314504501124), we get a palindrome (737419909914737).

The spelling of 421105405413613 in words is "four hundred twenty-one trillion, one hundred five billion, four hundred five million, four hundred thirteen thousand, six hundred thirteen".