2011122120001 has 4 divisors (see below), whose sum is σ = 2013737364100. Its totient is φ = 2008506875904.

The previous prime is 2011122119969. The next prime is 2011122120011. The reversal of 2011122120001 is 1000212211102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 954286719376 + 1056835400625 = 976876^2 + 1028025^2 .

It is a cyclic number.

It is not a de Polignac number, because 2011122120001 - 2⁵ = 2011122119969 is a prime.

It is a super-2 number, since 2×2011122120001² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2011122120011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1307620896 + ... + 1307622433.

It is an arithmetic number, because the mean of its divisors is an integer number (503434341025).

Almost surely, 2^{2011122120001} is an apocalyptic number.

It is an amenable number.

2011122120001 is a deficient number, since it is larger than the sum of its proper divisors (2615244099).

2011122120001 is an equidigital number, since it uses as much as digits as its factorization.

2011122120001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2615244098.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2011122120001 its reverse (1000212211102), we get a palindrome (3011334331103).

The spelling of 2011122120001 in words is "two trillion, eleven billion, one hundred twenty-two million, one hundred twenty thousand, one".