2113020021 has 8 divisors (see below), whose sum is σ = 3219840064. Its totient is φ = 1207440000.

The previous prime is 2113019983. The next prime is 2113020023. The reversal of 2113020021 is 1200203112.

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

It is not a de Polignac number, because 2113020021 - 2¹⁷ = 2112888949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2113019979 and 2113020006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2113020023) 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, 50309980 + ... + 50310021.

It is an arithmetic number, because the mean of its divisors is an integer number (402480008).

Almost surely, 2^2113020021 is an apocalyptic number.

2113020021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2113020021 is a deficient number, since it is larger than the sum of its proper divisors (1106820043).

2113020021 is a wasteful number, since it uses less digits than its factorization.

2113020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100620011.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 2113020021 is about 45967.5975117256. The cubic root of 2113020021 is about 1283.2202487788.

Adding to 2113020021 its reverse (1200203112), we get a palindrome (3313223133).

The spelling of 2113020021 in words is "two billion, one hundred thirteen million, twenty thousand, twenty-one".