421210115421 has 8 divisors (see below), whose sum is σ = 594649574784. Its totient is φ = 264288699840.

The previous prime is 421210115411. The next prime is 421210115423. The reversal of 421210115421 is 124511012124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 421210115421 - 2³¹ = 419062631773 is a prime.

It is a super-2 number, since 2×421210115421² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 421210115391 and 421210115400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421210115423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4129510885 + ... + 4129510986.

It is an arithmetic number, because the mean of its divisors is an integer number (74331196848).

Almost surely, 2^421210115421 is an apocalyptic number.

It is an amenable number.

421210115421 is a deficient number, since it is larger than the sum of its proper divisors (173439459363).

421210115421 is a wasteful number, since it uses less digits than its factorization.

421210115421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8259021891.

The product of its (nonzero) digits is 640, while the sum is 24.

Adding to 421210115421 its reverse (124511012124), we get a palindrome (545721127545).

The spelling of 421210115421 in words is "four hundred twenty-one billion, two hundred ten million, one hundred fifteen thousand, four hundred twenty-one".