10001121 has 16 divisors (see below), whose sum is σ = 14508480. Its totient is φ = 6091200.

The previous prime is 10001119. The next prime is 10001203. The reversal of 10001121 is 12110001.

It is not a de Polignac number, because 10001121 - 2¹ = 10001119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (10001221) 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 15 ways as a sum of consecutive naturals, for example, 2670 + ... + 5208.

It is an arithmetic number, because the mean of its divisors is an integer number (906780).

Almost surely, 2^10001121 is an apocalyptic number.

It is an amenable number.

10001121 is a deficient number, since it is larger than the sum of its proper divisors (4507359).

10001121 is a wasteful number, since it uses less digits than its factorization.

10001121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2656.

The product of its (nonzero) digits is 2, while the sum is 6.

The square root of 10001121 is about 3162.4549008642. The cubic root of 10001121 is about 215.4515191067.

Adding to 10001121 its reverse (12110001), we get a palindrome (22111122).

Multiplying 10001121 by its reverse (12110001), we get a palindrome (121113585311121).

It can be divided in two parts, 10001 and 121, that multiplied together give a palindrome (1210121).

The spelling of 10001121 in words is "ten million, one thousand, one hundred twenty-one".