100420410221 has 4 divisors (see below), whose sum is σ = 100550996700. Its totient is φ = 100289823744.

The previous prime is 100420410199. The next prime is 100420410229. The reversal of 100420410221 is 122014024001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122014024001 = 199 ⋅613135799.

It can be written as a sum of positive squares in 2 ways, for example, as 47497407721 + 52923002500 = 217939^2 + 230050^2 .

It is a cyclic number.

It is not a de Polignac number, because 100420410221 - 2¹⁴ = 100420393837 is a prime.

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 100420410221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100420410229) 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, 65292086 + ... + 65293623.

It is an arithmetic number, because the mean of its divisors is an integer number (25137749175).

Almost surely, 2^100420410221 is an apocalyptic number.

It is an amenable number.

100420410221 is a deficient number, since it is larger than the sum of its proper divisors (130586479).

100420410221 is an equidigital number, since it uses as much as digits as its factorization.

100420410221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130586478.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 100420410221 its reverse (122014024001), we get a palindrome (222434434222).

The spelling of 100420410221 in words is "one hundred billion, four hundred twenty million, four hundred ten thousand, two hundred twenty-one".