10021881 has 8 divisors (see below), whose sum is σ = 13673440. Its totient is φ = 6525792.

The previous prime is 10021877. The next prime is 10021883. The reversal of 10021881 is 18812001.

10021881 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 10021881 - 2² = 10021877 is a prime.

It is a super-2 number, since 2×10021881² = 200876197556322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10021883) 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, 38716 + ... + 38973.

It is an arithmetic number, because the mean of its divisors is an integer number (1709180).

Almost surely, 2^10021881 is an apocalyptic number.

It is an amenable number.

10021881 is a deficient number, since it is larger than the sum of its proper divisors (3651559).

10021881 is an equidigital number, since it uses as much as digits as its factorization.

10021881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77735.

The product of its (nonzero) digits is 128, while the sum is 21.

The square root of 10021881 is about 3165.7354595733. The cubic root of 10021881 is about 215.6004918165.

Adding to 10021881 its reverse (18812001), we get a palindrome (28833882).

The spelling of 10021881 in words is "ten million, twenty-one thousand, eight hundred eighty-one".