420124301021 has 4 divisors (see below), whose sum is σ = 420163043712. Its totient is φ = 420085558332.

The previous prime is 420124300993. The next prime is 420124301087. The reversal of 420124301021 is 120103421024.

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 420124301021 - 2¹⁸ = 420124038877 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 420124300984 and 420124301002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420124301321) 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, 19355075 + ... + 19376768.

It is an arithmetic number, because the mean of its divisors is an integer number (105040760928).

Almost surely, 2^420124301021 is an apocalyptic number.

It is an amenable number.

420124301021 is a deficient number, since it is larger than the sum of its proper divisors (38742691).

420124301021 is a wasteful number, since it uses less digits than its factorization.

420124301021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38742690.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 420124301021 its reverse (120103421024), we get a palindrome (540227722045).

The spelling of 420124301021 in words is "four hundred twenty billion, one hundred twenty-four million, three hundred one thousand, twenty-one".