10001121021001 has 16 divisors (see below), whose sum is σ = 11484686093760. Its totient is φ = 8613296758080.

The previous prime is 10001121020981. The next prime is 10001121021037. The reversal of 10001121021001 is 10012012110001.

It is not a de Polignac number, because 10001121021001 - 2⁷ = 10001121020873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (10001121021071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19297675 + ... + 19809151.

It is an arithmetic number, because the mean of its divisors is an integer number (717792880860).

Almost surely, 2^{10001121021001} is an apocalyptic number.

10001121021001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10001121021001 is a deficient number, since it is larger than the sum of its proper divisors (1483565072759).

10001121021001 is a wasteful number, since it uses less digits than its factorization.

10001121021001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605064.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 10001121021001 its reverse (10012012110001), we get a palindrome (20013133131002).

The spelling of 10001121021001 in words is "ten trillion, one billion, one hundred twenty-one million, twenty-one thousand, one".