20110121120 has 24 divisors (see below), whose sum is σ = 47510161524. Its totient is φ = 8044048384.

The previous prime is 20110121107. The next prime is 20110121131. The reversal of 20110121120 is 2112101102.

It can be written as a sum of positive squares in 2 ways, for example, as 17138999056 + 2971122064 = 130916^2 + 54508^2 .

It is a super-2 number, since 2×20110121120² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62843969 + ... + 62844288.

Almost surely, 2^20110121120 is an apocalyptic number.

20110121120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20110121120 is an abundant number, since it is smaller than the sum of its proper divisors (27400040404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20110121120 is a wasteful number, since it uses less digits than its factorization.

20110121120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125688272 (or 125688264 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20110121120 its reverse (2112101102), we get a palindrome (22222222222).

The spelling of 20110121120 in words is "twenty billion, one hundred ten million, one hundred twenty-one thousand, one hundred twenty".