2100420013 has 4 divisors (see below), whose sum is σ = 2107262080. Its totient is φ = 2093577948.

The previous prime is 2100419977. The next prime is 2100420019. The reversal of 2100420013 is 3100240012.

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 2100420013 - 2¹³ = 2100411821 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2100419975 and 2100420002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100420019) 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, 3420573 + ... + 3421186.

It is an arithmetic number, because the mean of its divisors is an integer number (526815520).

Almost surely, 2^2100420013 is an apocalyptic number.

It is an amenable number.

2100420013 is a deficient number, since it is larger than the sum of its proper divisors (6842067).

2100420013 is an equidigital number, since it uses as much as digits as its factorization.

2100420013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6842066.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 2100420013 is about 45830.3394379749. The cubic root of 2100420013 is about 1280.6645338831.

Adding to 2100420013 its reverse (3100240012), we get a palindrome (5200660025).

The spelling of 2100420013 in words is "two billion, one hundred million, four hundred twenty thousand, thirteen".