103121120020 has 12 divisors (see below), whose sum is σ = 216554352084. Its totient is φ = 41248448000.

The previous prime is 103121119967. The next prime is 103121120023. The reversal of 103121120020 is 20021121301.

It can be written as a sum of positive squares in 2 ways, for example, as 81546798096 + 21574321924 = 285564^2 + 146882^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103121120023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2578027981 + ... + 2578028020.

It is an arithmetic number, because the mean of its divisors is an integer number (18046196007).

Almost surely, 2^103121120020 is an apocalyptic number.

103121120020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

103121120020 is an abundant number, since it is smaller than the sum of its proper divisors (113433232064).

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

103121120020 is a wasteful number, since it uses less digits than its factorization.

103121120020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5156056010 (or 5156056008 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 103121120020 its reverse (20021121301), we get a palindrome (123142241321).

The spelling of 103121120020 in words is "one hundred three billion, one hundred twenty-one million, one hundred twenty thousand, twenty".