10001201121 has 24 divisors (see below), whose sum is σ = 15315233024. Its totient is φ = 6277992480.

The previous prime is 10001201011. The next prime is 10001201123. The reversal of 10001201121 is 12110210001.

It is a happy number.

10001201121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10001201121 - 2²¹ = 9999103969 is a prime.

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

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (10001201123) 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 23 ways as a sum of consecutive naturals, for example, 474091 + ... + 494736.

Almost surely, 2^10001201121 is an apocalyptic number.

It is an amenable number.

10001201121 is a deficient number, since it is larger than the sum of its proper divisors (5314031903).

10001201121 is a wasteful number, since it uses less digits than its factorization.

10001201121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 968901 (or 968898 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 10001201121 its reverse (12110210001), we get a palindrome (22111411122).

The spelling of 10001201121 in words is "ten billion, one million, two hundred one thousand, one hundred twenty-one".