103131121220 has 12 divisors (see below), whose sum is σ = 216575354604. Its totient is φ = 41252448480.

The previous prime is 103131121201. The next prime is 103131121273. The reversal of 103131121220 is 22121131301.

It can be written as a sum of positive squares in 2 ways, for example, as 72826578496 + 30304542724 = 269864^2 + 174082^2 .

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, 2578278011 + ... + 2578278050.

It is an arithmetic number, because the mean of its divisors is an integer number (18047946217).

Almost surely, 2^103131121220 is an apocalyptic number.

103131121220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

103131121220 is an abundant number, since it is smaller than the sum of its proper divisors (113444233384).

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

103131121220 is a wasteful number, since it uses less digits than its factorization.

103131121220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5156556070 (or 5156556068 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 103131121220 its reverse (22121131301), we get a palindrome (125252252521).

The spelling of 103131121220 in words is "one hundred three billion, one hundred thirty-one million, one hundred twenty-one thousand, two hundred twenty".