2131303121123 has 4 divisors (see below), whose sum is σ = 2325057950328. Its totient is φ = 1937548291920.

The previous prime is 2131303121119. The next prime is 2131303121203. The reversal of 2131303121123 is 3211213031312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2131303121123 - 2² = 2131303121119 is a prime.

It is a super-2 number, since 2×2131303121123² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2131303721123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96877414586 + ... + 96877414607.

It is an arithmetic number, because the mean of its divisors is an integer number (581264487582).

Almost surely, 2^{2131303121123} is an apocalyptic number.

2131303121123 is a deficient number, since it is larger than the sum of its proper divisors (193754829205).

2131303121123 is a wasteful number, since it uses less digits than its factorization.

2131303121123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193754829204.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 2131303121123 its reverse (3211213031312), we get a palindrome (5342516152435).

The spelling of 2131303121123 in words is "two trillion, one hundred thirty-one billion, three hundred three million, one hundred twenty-one thousand, one hundred twenty-three".