20101120120 has 16 divisors (see below), whose sum is σ = 45227520360. Its totient is φ = 8040448032.

The previous prime is 20101120111. The next prime is 20101120139. The reversal of 20101120120 is 2102110102.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 20101120097 and 20101120106.

It is a congruent 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, 251263962 + ... + 251264041.

Almost surely, 2^20101120120 is an apocalyptic number.

20101120120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20101120120 is an abundant number, since it is smaller than the sum of its proper divisors (25126400240).

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

20101120120 is a wasteful number, since it uses less digits than its factorization.

20101120120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502528014 (or 502528010 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20101120120 its reverse (2102110102), we get a palindrome (22203230222).

The spelling of 20101120120 in words is "twenty billion, one hundred one million, one hundred twenty thousand, one hundred twenty".