420204012234421 has 32 divisors (see below), whose sum is σ = 462035034020448. Its totient is φ = 380539892367360.

The previous prime is 420204012234407. The next prime is 420204012234451. The reversal of 420204012234421 is 124432210402024.

It can be written as a sum of positive squares in 16 ways, for example, as 216826037300196 + 203377974934225 = 14725014^2 + 14261065^2 .

It is a cyclic number.

It is not a de Polignac number, because 420204012234421 - 2¹⁷ = 420204012103349 is a prime.

It is a super-3 number, since 3×420204012234421³ (a number of 45 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420204012234401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1439633731 + ... + 1439925583.

It is an arithmetic number, because the mean of its divisors is an integer number (14438594813139).

Almost surely, 2^{420204012234421} is an apocalyptic number.

420204012234421 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

420204012234421 is a deficient number, since it is larger than the sum of its proper divisors (41831021786027).

420204012234421 is a wasteful number, since it uses less digits than its factorization.

420204012234421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320281.

The product of its (nonzero) digits is 24576, while the sum is 31.

Adding to 420204012234421 its reverse (124432210402024), we get a palindrome (544636222636445).

The spelling of 420204012234421 in words is "four hundred twenty trillion, two hundred four billion, twelve million, two hundred thirty-four thousand, four hundred twenty-one".