20100220120 has 16 divisors (see below), whose sum is σ = 45225495360. Its totient is φ = 8040088032.

The previous prime is 20100220109. The next prime is 20100220139. The reversal of 20100220120 is 2102200102.

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 = 20100220097 and 20100220106.

It is a congruent number.

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, 251252712 + ... + 251252791.

It is an arithmetic number, because the mean of its divisors is an integer number (2826593460).

Almost surely, 2^20100220120 is an apocalyptic number.

20100220120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20100220120 is an abundant number, since it is smaller than the sum of its proper divisors (25125275240).

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

20100220120 is a wasteful number, since it uses less digits than its factorization.

20100220120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502505514 (or 502505510 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 20100220120 its reverse (2102200102), we get a palindrome (22202420222).

It can be divided in two parts, 201002 and 20120, that added together give a palindrome (221122).

The spelling of 20100220120 in words is "twenty billion, one hundred million, two hundred twenty thousand, one hundred twenty".