20111010110001 has 6 divisors (see below), whose sum is σ = 29049236825570. Its totient is φ = 13407340073328.

The previous prime is 20111010109961. The next prime is 20111010110027. The reversal of 20111010110001 is 10001101011102.

It can be written as a sum of positive squares in only one way, i.e., 18901417075776 + 1209593034225 = 4347576^2 + 1099815^2 .

It is not a de Polignac number, because 20111010110001 - 2¹⁰ = 20111010108977 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 2234556678889 = 20111010110001 / (2 + 0 + 1 + 1 + 1 + 0 + 1 + 0 + 1 + 1 + 0 + 0 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20111010110101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1117278339436 + ... + 1117278339453.

Almost surely, 2^{20111010110001} is an apocalyptic number.

It is an amenable number.

20111010110001 is a deficient number, since it is larger than the sum of its proper divisors (8938226715569).

20111010110001 is a wasteful number, since it uses less digits than its factorization.

20111010110001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2234556678895 (or 2234556678892 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 20111010110001 its reverse (10001101011102), we get a palindrome (30112111121103).

The spelling of 20111010110001 in words is "twenty trillion, one hundred eleven billion, ten million, one hundred ten thousand, one".