10021120001001 has 24 divisors (see below), whose sum is σ = 14543164621440. Its totient is φ = 6649337508000.

The previous prime is 10021120000993. The next prime is 10021120001003. The reversal of 10021120001001 is 10010002112001.

It is a happy number.

It is not a de Polignac number, because 10021120001001 - 2³ = 10021120000993 is a prime.

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 (10021120001003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1457550 + ... + 4708151.

It is an arithmetic number, because the mean of its divisors is an integer number (605965192560).

Almost surely, 2^{10021120001001} is an apocalyptic number.

It is an amenable number.

10021120001001 is a deficient number, since it is larger than the sum of its proper divisors (4522044620439).

10021120001001 is a wasteful number, since it uses less digits than its factorization.

10021120001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6166557 (or 6166554 counting only the distinct ones).

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

Adding to 10021120001001 its reverse (10010002112001), we get a palindrome (20031122113002).

The spelling of 10021120001001 in words is "ten trillion, twenty-one billion, one hundred twenty million, one thousand, one".