20111122100001 has 32 divisors (see below), whose sum is σ = 28438696356480. Its totient is φ = 12598075736064.

The previous prime is 20111122099997. The next prime is 20111122100033. The reversal of 20111122100001 is 10000122111102.

It is not a de Polignac number, because 20111122100001 - 2² = 20111122099997 is a prime.

It is a super-2 number, since 2×20111122100001² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20111122100001.

It is not an unprimeable number, because it can be changed into a prime (20111122100801) 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, 135342321 + ... + 135490833.

It is an arithmetic number, because the mean of its divisors is an integer number (888709261140).

Almost surely, 2^{20111122100001} is an apocalyptic number.

It is an amenable number.

20111122100001 is a deficient number, since it is larger than the sum of its proper divisors (8327574256479).

20111122100001 is a wasteful number, since it uses less digits than its factorization.

20111122100001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152865.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20111122100001 its reverse (10000122111102), we get a palindrome (30111244211103).

The spelling of 20111122100001 in words is "twenty trillion, one hundred eleven billion, one hundred twenty-two million, one hundred thousand, one".