420434111134121 has 16 divisors (see below), whose sum is σ = 491638143782400. Its totient is φ = 359390154836160.

The previous prime is 420434111134013. The next prime is 420434111134129. The reversal of 420434111134121 is 121431111434024.

It is a de Polignac number, because none of the positive numbers 2^k-420434111134121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420434111134129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1669840640 + ... + 1670092401.

It is an arithmetic number, because the mean of its divisors is an integer number (30727383986400).

Almost surely, 2^{420434111134121} is an apocalyptic number.

It is an amenable number.

420434111134121 is a deficient number, since it is larger than the sum of its proper divisors (71204032648279).

420434111134121 is an equidigital number, since it uses as much as digits as its factorization.

420434111134121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3339933429 (or 3339933415 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

Adding to 420434111134121 its reverse (121431111434024), we get a palindrome (541865222568145).

The spelling of 420434111134121 in words is "four hundred twenty trillion, four hundred thirty-four billion, one hundred eleven million, one hundred thirty-four thousand, one hundred twenty-one".