10021131 has 8 divisors (see below), whose sum is σ = 14846160. Its totient is φ = 6680736.

The previous prime is 10021129. The next prime is 10021147. The reversal of 10021131 is 13112001.

It is not a de Polignac number, because 10021131 - 2¹ = 10021129 is a prime.

It is a super-2 number, since 2×10021131² = 200846133038322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (10021111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185550 + ... + 185603.

It is an arithmetic number, because the mean of its divisors is an integer number (1855770).

Almost surely, 2^10021131 is an apocalyptic number.

10021131 is a deficient number, since it is larger than the sum of its proper divisors (4825029).

10021131 is an equidigital number, since it uses as much as digits as its factorization.

10021131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371162 (or 371156 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 10021131 is about 3165.6170014706. The cubic root of 10021131 is about 215.5951134381.

Adding to 10021131 its reverse (13112001), we get a palindrome (23133132).

The spelling of 10021131 in words is "ten million, twenty-one thousand, one hundred thirty-one".