420403224034021 has 4 divisors (see below), whose sum is σ = 425724783832000. Its totient is φ = 415081664236044.

The previous prime is 420403224033979. The next prime is 420403224034033. The reversal of 420403224034021 is 120430422304024.

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 420403224034021 - 2⁷ = 420403224033893 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 (420403224037021) 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, 2660779898871 + ... + 2660779899028.

It is an arithmetic number, because the mean of its divisors is an integer number (106431195958000).

Almost surely, 2^{420403224034021} is an apocalyptic number.

It is an amenable number.

420403224034021 is a deficient number, since it is larger than the sum of its proper divisors (5321559797979).

420403224034021 is an equidigital number, since it uses as much as digits as its factorization.

420403224034021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5321559797978.

The product of its (nonzero) digits is 36864, while the sum is 31.

Adding to 420403224034021 its reverse (120430422304024), we get a palindrome (540833646338045).

The spelling of 420403224034021 in words is "four hundred twenty trillion, four hundred three billion, two hundred twenty-four million, thirty-four thousand, twenty-one".