420110210221 has 4 divisors (see below), whose sum is σ = 452426380252. Its totient is φ = 387794040192.

The previous prime is 420110210203. The next prime is 420110210231. The reversal of 420110210221 is 122012011024.

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 173484745225 + 246625464996 = 416515^2 + 496614^2 .

It is not a de Polignac number, because 420110210221 - 2⁵ = 420110210189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 420110210195 and 420110210204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420110210231) 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, 16158084996 + ... + 16158085021.

It is an arithmetic number, because the mean of its divisors is an integer number (113106595063).

Almost surely, 2^420110210221 is an apocalyptic number.

It is an amenable number.

420110210221 is a deficient number, since it is larger than the sum of its proper divisors (32316170031).

420110210221 is a wasteful number, since it uses less digits than its factorization.

420110210221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32316170030.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 420110210221 its reverse (122012011024), we get a palindrome (542122221245).

The spelling of 420110210221 in words is "four hundred twenty billion, one hundred ten million, two hundred ten thousand, two hundred twenty-one".