20101121002001 has 16 divisors (see below), whose sum is σ = 22075410772800. Its totient is φ = 18191394212160.

The previous prime is 20101121001989. The next prime is 20101121002009. The reversal of 20101121002001 is 10020012110102.

It is not a de Polignac number, because 20101121002001 - 2¹⁰ = 20101121000977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20101121002009) 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, 70963226 + ... + 71245923.

It is an arithmetic number, because the mean of its divisors is an integer number (1379713173300).

Almost surely, 2^{20101121002001} is an apocalyptic number.

It is an amenable number.

20101121002001 is a deficient number, since it is larger than the sum of its proper divisors (1974289770799).

20101121002001 is a wasteful number, since it uses less digits than its factorization.

20101121002001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142209376.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20101121002001 its reverse (10020012110102), we get a palindrome (30121133112103).

The spelling of 20101121002001 in words is "twenty trillion, one hundred one billion, one hundred twenty-one million, two thousand, one".