421313100231421 has 4 divisors (see below), whose sum is σ = 439631061111072. Its totient is φ = 402995139351772.

The previous prime is 421313100231379. The next prime is 421313100231427. The reversal of 421313100231421 is 124132001313124.

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 not a de Polignac number, because 421313100231421 - 2²³ = 421313091842813 is a prime.

It is a super-2 number, since 2×421313100231421² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 421313100231421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421313100231427) 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, 9158980439791 + ... + 9158980439836.

It is an arithmetic number, because the mean of its divisors is an integer number (109907765277768).

Almost surely, 2^{421313100231421} is an apocalyptic number.

It is an amenable number.

421313100231421 is a deficient number, since it is larger than the sum of its proper divisors (18317960879651).

421313100231421 is a wasteful number, since it uses less digits than its factorization.

421313100231421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18317960879650.

The product of its (nonzero) digits is 3456, while the sum is 28.

Adding to 421313100231421 its reverse (124132001313124), we get a palindrome (545445101544545).

The spelling of 421313100231421 in words is "four hundred twenty-one trillion, three hundred thirteen billion, one hundred million, two hundred thirty-one thousand, four hundred twenty-one".