420224100221 has 8 divisors (see below), whose sum is σ = 422884539264. Its totient is φ = 417571711920.

The previous prime is 420224100203. The next prime is 420224100269. The reversal of 420224100221 is 122001422024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420224100221 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 = 420224100193 and 420224100202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420224100421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1907945 + ... + 2116766.

It is an arithmetic number, because the mean of its divisors is an integer number (52860567408).

Almost surely, 2^420224100221 is an apocalyptic number.

It is an amenable number.

420224100221 is a deficient number, since it is larger than the sum of its proper divisors (2660439043).

420224100221 is a wasteful number, since it uses less digits than its factorization.

420224100221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4025371.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 420224100221 its reverse (122001422024), we get a palindrome (542225522245).

The spelling of 420224100221 in words is "four hundred twenty billion, two hundred twenty-four million, one hundred thousand, two hundred twenty-one".