20111200002001 has 32 divisors (see below), whose sum is σ = 21555199411200. Its totient is φ = 18719414461440.

The previous prime is 20111200001947. The next prime is 20111200002013. The reversal of 20111200002001 is 10020000211102.

It is not a de Polignac number, because 20111200002001 - 2⁹ = 20111200001489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20111200002031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1265723065 + ... + 1265738953.

It is an arithmetic number, because the mean of its divisors is an integer number (673599981600).

Almost surely, 2^{20111200002001} is an apocalyptic number.

It is an amenable number.

20111200002001 is a deficient number, since it is larger than the sum of its proper divisors (1443999409199).

20111200002001 is a wasteful number, since it uses less digits than its factorization.

20111200002001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22609.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20111200002001 its reverse (10020000211102), we get a palindrome (30131200213103).

The spelling of 20111200002001 in words is "twenty trillion, one hundred eleven billion, two hundred million, two thousand, one".