12103131203121 has 16 divisors (see below), whose sum is σ = 18496016077824. Its totient is φ = 6896143917264.

The previous prime is 12103131203077. The next prime is 12103131203129. The reversal of 12103131203121 is 12130213130121.

It is not a de Polignac number, because 12103131203121 - 2⁹ = 12103131202609 is a prime.

It is a super-2 number, since 2×12103131203121² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (12103131203129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 830453205 + ... + 830467778.

It is an arithmetic number, because the mean of its divisors is an integer number (1156001004864).

Almost surely, 2^{12103131203121} is an apocalyptic number.

It is an amenable number.

12103131203121 is a deficient number, since it is larger than the sum of its proper divisors (6392884874703).

12103131203121 is a wasteful number, since it uses less digits than its factorization.

12103131203121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1660921340.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 12103131203121 its reverse (12130213130121), we get a palindrome (24233344333242).

The spelling of 12103131203121 in words is "twelve trillion, one hundred three billion, one hundred thirty-one million, two hundred three thousand, one hundred twenty-one".