420551413555221 has 80 divisors (see below), whose sum is σ = 713429802402240. Its totient is φ = 244744276861440.

The previous prime is 420551413555219. The next prime is 420551413555241. The reversal of 420551413555221 is 122555314155024.

420551413555221 is a `hidden beast` number, since 4 + 2 + 0 + 5 + 5 + 1 + 41 + 35 + 552 + 21 = 666.

It is not a de Polignac number, because 420551413555221 - 2¹ = 420551413555219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420551413555241) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 7404100 + ... + 29931981.

It is an arithmetic number, because the mean of its divisors is an integer number (8917872530028).

Almost surely, 2^{420551413555221} is an apocalyptic number.

It is an amenable number.

420551413555221 is a deficient number, since it is larger than the sum of its proper divisors (292878388847019).

420551413555221 is a wasteful number, since it uses less digits than its factorization.

420551413555221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37336688 (or 37336679 counting only the distinct ones).

The product of its (nonzero) digits is 1200000, while the sum is 45.

The spelling of 420551413555221 in words is "four hundred twenty trillion, five hundred fifty-one billion, four hundred thirteen million, five hundred fifty-five thousand, two hundred twenty-one".