420332102042221 has 8 divisors (see below), whose sum is σ = 434826841030200. Its totient is φ = 405837398292480.

The previous prime is 420332102042197. The next prime is 420332102042227. The reversal of 420332102042221 is 122240201233024.

It can be written as a sum of positive squares in 4 ways, for example, as 12222813100996 + 408109288941225 = 3496114^2 + 20201715^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 420332102042221 - 2⁷ = 420332102042093 is a prime.

It is a super-2 number, since 2×420332102042221² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 420332102042221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420332102042227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16711525 + ... + 33465493.

It is an arithmetic number, because the mean of its divisors is an integer number (54353355128775).

Almost surely, 2^{420332102042221} is an apocalyptic number.

It is an amenable number.

420332102042221 is a deficient number, since it is larger than the sum of its proper divisors (14494738987979).

420332102042221 is a wasteful number, since it uses less digits than its factorization.

420332102042221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17619119.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 420332102042221 its reverse (122240201233024), we get a palindrome (542572303275245).

The spelling of 420332102042221 in words is "four hundred twenty trillion, three hundred thirty-two billion, one hundred two million, forty-two thousand, two hundred twenty-one".