2021421113 has 8 divisors (see below), whose sum is σ = 2060830728. Its totient is φ = 1982058624.

The previous prime is 2021421107. The next prime is 2021421119. The reversal of 2021421113 is 3111241202.

It is an interprime number because it is at equal distance from previous prime (2021421107) and next prime (2021421119).

It can be written as a sum of positive squares in 4 ways, for example, as 380523049 + 1640898064 = 19507^2 + 40508^2 .

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 2021421113 - 2¹⁴ = 2021404729 is a prime.

It is a super-2 number, since 2×2021421113² = 8172286632164317538, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2021421091 and 2021421100.

It is not an unprimeable number, because it can be changed into a prime (2021421119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82031 + ... + 103787.

It is an arithmetic number, because the mean of its divisors is an integer number (257603841).

Almost surely, 2^2021421113 is an apocalyptic number.

It is an amenable number.

2021421113 is a deficient number, since it is larger than the sum of its proper divisors (39409615).

2021421113 is a wasteful number, since it uses less digits than its factorization.

2021421113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23563.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 2021421113 is about 44960.2170034799. The cubic root of 2021421113 is about 1264.4032374022.

Adding to 2021421113 its reverse (3111241202), we get a palindrome (5132662315).

The spelling of 2021421113 in words is "two billion, twenty-one million, four hundred twenty-one thousand, one hundred thirteen".