2131223013123 has 8 divisors (see below), whose sum is σ = 2847064014528. Its totient is φ = 1418098676904.

The previous prime is 2131223013119. The next prime is 2131223013133. The reversal of 2131223013123 is 3213103221312.

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

It is not a de Polignac number, because 2131223013123 - 2² = 2131223013119 is a prime.

It is a super-2 number, since 2×2131223013123² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2131223013093 and 2131223013102.

It is not an unprimeable number, because it can be changed into a prime (2131223013133) 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, 679164465 + ... + 679167602.

It is an arithmetic number, because the mean of its divisors is an integer number (355883001816).

Almost surely, 2^{2131223013123} is an apocalyptic number.

2131223013123 is a deficient number, since it is larger than the sum of its proper divisors (715841001405).

2131223013123 is a wasteful number, since it uses less digits than its factorization.

2131223013123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1358332593.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 2131223013123 its reverse (3213103221312), we get a palindrome (5344326234435).

The spelling of 2131223013123 in words is "two trillion, one hundred thirty-one billion, two hundred twenty-three million, thirteen thousand, one hundred twenty-three".