2021110013 has 4 divisors (see below), whose sum is σ = 2176580028. Its totient is φ = 1865640000.

The previous prime is 2021110001. The next prime is 2021110033. The reversal of 2021110013 is 3100111202.

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 698914969 + 1322195044 = 26437^2 + 36362^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021110013 - 2⁴ = 2021109997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2021109976 and 2021110003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021110033) 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, 77734988 + ... + 77735013.

It is an arithmetic number, because the mean of its divisors is an integer number (544145007).

Almost surely, 2^2021110013 is an apocalyptic number.

It is an amenable number.

2021110013 is a deficient number, since it is larger than the sum of its proper divisors (155470015).

2021110013 is a wasteful number, since it uses less digits than its factorization.

2021110013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155470014.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 2021110013 is about 44956.7571450611. The cubic root of 2021110013 is about 1264.3383695021.

Adding to 2021110013 its reverse (3100111202), we get a palindrome (5121221215).

The spelling of 2021110013 in words is "two billion, twenty-one million, one hundred ten thousand, thirteen".