20011100022001 has 16 divisors (see below), whose sum is σ = 21891125393280. Its totient is φ = 18141233886720.

The previous prime is 20011100021947. The next prime is 20011100022029. The reversal of 20011100022001 is 10022000111002.

It is a cyclic number.

It is not a de Polignac number, because 20011100022001 - 2³⁷ = 19873661068529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20011100020001) 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, 19451521 + ... + 20454433.

It is an arithmetic number, because the mean of its divisors is an integer number (1368195337080).

Almost surely, 2^{20011100022001} is an apocalyptic number.

It is an amenable number.

20011100022001 is a deficient number, since it is larger than the sum of its proper divisors (1880025371279).

20011100022001 is a wasteful number, since it uses less digits than its factorization.

20011100022001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1007976.

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

Adding to 20011100022001 its reverse (10022000111002), we get a palindrome (30033100133003).

The spelling of 20011100022001 in words is "twenty trillion, eleven billion, one hundred million, twenty-two thousand, one".