100001021220013 has 4 divisors (see below), whose sum is σ = 100084844373948. Its totient is φ = 99917198066080.

The previous prime is 100001021220011. The next prime is 100001021220073. The reversal of 100001021220013 is 310022120100001.

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 43278477935044 + 56722543284969 = 6578638^2 + 7531437^2 .

It is a cyclic number.

It is not a de Polignac number, because 100001021220013 - 2¹ = 100001021220011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100001021219975 and 100001021220002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100001021220011) 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, 41911575178 + ... + 41911577563.

It is an arithmetic number, because the mean of its divisors is an integer number (25021211093487).

Almost surely, 2^{100001021220013} is an apocalyptic number.

It is an amenable number.

100001021220013 is a deficient number, since it is larger than the sum of its proper divisors (83823153935).

100001021220013 is an equidigital number, since it uses as much as digits as its factorization.

100001021220013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83823153934.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 100001021220013 its reverse (310022120100001), we get a palindrome (410023141320014).

The spelling of 100001021220013 in words is "one hundred trillion, one billion, twenty-one million, two hundred twenty thousand, thirteen".