100420405061 has 4 divisors (see below), whose sum is σ = 102557009472. Its totient is φ = 98283800652.

The previous prime is 100420405003. The next prime is 100420405073. The reversal of 100420405061 is 160504024001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 100420405061 - 2¹⁸ = 100420142917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100420705061) 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, 1068302135 + ... + 1068302228.

It is an arithmetic number, because the mean of its divisors is an integer number (25639252368).

Almost surely, 2^100420405061 is an apocalyptic number.

It is an amenable number.

100420405061 is a deficient number, since it is larger than the sum of its proper divisors (2136604411).

100420405061 is an equidigital number, since it uses as much as digits as its factorization.

100420405061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2136604410.

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 100420405061 its reverse (160504024001), we get a palindrome (260924429062).

The spelling of 100420405061 in words is "one hundred billion, four hundred twenty million, four hundred five thousand, sixty-one".