420030542221 has 4 divisors (see below), whose sum is σ = 420034405372. Its totient is φ = 420026679072.

The previous prime is 420030542219. The next prime is 420030542233. The reversal of 420030542221 is 122245030024.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 78958190025 + 341072352196 = 280995^2 + 584014^2 .

It is a cyclic number.

It is not a de Polignac number, because 420030542221 - 2¹ = 420030542219 is a prime.

It is a super-2 number, since 2×420030542221² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420030542291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1763616 + ... + 1987561.

It is an arithmetic number, because the mean of its divisors is an integer number (105008601343).

Almost surely, 2^420030542221 is an apocalyptic number.

It is an amenable number.

420030542221 is a deficient number, since it is larger than the sum of its proper divisors (3863151).

420030542221 is a wasteful number, since it uses less digits than its factorization.

420030542221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3863150.

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 420030542221 its reverse (122245030024), we get a palindrome (542275572245).

The spelling of 420030542221 in words is "four hundred twenty billion, thirty million, five hundred forty-two thousand, two hundred twenty-one".