20110120220105 has 4 divisors (see below), whose sum is σ = 24132144264132. Its totient is φ = 16088096176080.

The previous prime is 20110120220077. The next prime is 20110120220161. The reversal of 20110120220105 is 50102202101102.

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 6205544334649 + 13904575885456 = 2491093^2 + 3728884^2 .

It is not a de Polignac number, because 20110120220105 - 2⁶ = 20110120220041 is a prime.

It is a super-2 number, since 2×20110120220105² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2011012022006 + ... + 2011012022015.

It is an arithmetic number, because the mean of its divisors is an integer number (6033036066033).

Almost surely, 2^{20110120220105} is an apocalyptic number.

It is an amenable number.

20110120220105 is a deficient number, since it is larger than the sum of its proper divisors (4022024044027).

20110120220105 is an equidigital number, since it uses as much as digits as its factorization.

20110120220105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4022024044026.

The product of its (nonzero) digits is 80, while the sum is 17.

Adding to 20110120220105 its reverse (50102202101102), we get a palindrome (70212322321207).

The spelling of 20110120220105 in words is "twenty trillion, one hundred ten billion, one hundred twenty million, two hundred twenty thousand, one hundred five".