2021220113 has 8 divisors (see below), whose sum is σ = 2222330880. Its totient is φ = 1823003280.

The previous prime is 2021220109. The next prime is 2021220139. The reversal of 2021220113 is 3110221202.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2021220113 - 2² = 2021220109 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2021220193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 722018 + ... + 724811.

It is an arithmetic number, because the mean of its divisors is an integer number (277791360).

Almost surely, 2^2021220113 is an apocalyptic number.

It is an amenable number.

2021220113 is a deficient number, since it is larger than the sum of its proper divisors (201110767).

2021220113 is a wasteful number, since it uses less digits than its factorization.

2021220113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1446967.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 2021220113 is about 44957.9816384143. The cubic root of 2021220113 is about 1264.3613273695.

Adding to 2021220113 its reverse (3110221202), we get a palindrome (5131441315).

The spelling of 2021220113 in words is "two billion, twenty-one million, two hundred twenty thousand, one hundred thirteen".