103131111121 has 8 divisors (see below), whose sum is σ = 104041146024. Its totient is φ = 102223355520.

The previous prime is 103131111077. The next prime is 103131111163. The reversal of 103131111121 is 121111131301.

It can be written as a sum of positive squares in 4 ways, for example, as 4808729025 + 98322382096 = 69345^2 + 313564^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 103131111121 - 2²¹ = 103129013969 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 103131111095 and 103131111104.

It is not an unprimeable number, because it can be changed into a prime (103131111191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 478870 + ... + 659983.

It is an arithmetic number, because the mean of its divisors is an integer number (13005143253).

Almost surely, 2^103131111121 is an apocalyptic number.

It is an amenable number.

103131111121 is a deficient number, since it is larger than the sum of its proper divisors (910034903).

103131111121 is a wasteful number, since it uses less digits than its factorization.

103131111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1139651.

The product of its (nonzero) digits is 18, while the sum is 16.

Adding to 103131111121 its reverse (121111131301), we get a palindrome (224242242422).

The spelling of 103131111121 in words is "one hundred three billion, one hundred thirty-one million, one hundred eleven thousand, one hundred twenty-one".