103120020 has 96 divisors (see below), whose sum is σ = 328352640. Its totient is φ = 26853120.

The previous prime is 103120007. The next prime is 103120057. The reversal of 103120020 is 20021301.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 103119984 and 103120011.

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 31 ways as a sum of consecutive naturals, for example, 21000 + ... + 25440.

It is an arithmetic number, because the mean of its divisors is an integer number (3420340).

Almost surely, 2^103120020 is an apocalyptic number.

103120020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 103120020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (164176320).

103120020 is an abundant number, since it is smaller than the sum of its proper divisors (225232620).

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

103120020 is a wasteful number, since it uses less digits than its factorization.

103120020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4502 (or 4494 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 103120020 is about 10154.8028045846. The cubic root of 103120020 is about 468.9368151370.

Adding to 103120020 its reverse (20021301), we get a palindrome (123141321).

The spelling of 103120020 in words is "one hundred three million, one hundred twenty thousand, twenty".