2211031310123 has 4 divisors (see below), whose sum is σ = 2213805503280. Its totient is φ = 2208257116968.

The previous prime is 2211031310087. The next prime is 2211031310161. The reversal of 2211031310123 is 3210131301122.

It is a happy number.

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 2211031310123 - 2¹⁰ = 2211031309099 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2211031310095 and 2211031310104.

It is not an unprimeable number, because it can be changed into a prime (2211031310723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1387095383 + ... + 1387096976.

It is an arithmetic number, because the mean of its divisors is an integer number (553451375820).

Almost surely, 2^{2211031310123} is an apocalyptic number.

2211031310123 is a deficient number, since it is larger than the sum of its proper divisors (2774193157).

2211031310123 is an equidigital number, since it uses as much as digits as its factorization.

2211031310123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2774193156.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 2211031310123 its reverse (3210131301122), we get a palindrome (5421162611245).

Subtracting 2211031310123 from its reverse (3210131301122), we obtain a palindrome (999099990999).

The spelling of 2211031310123 in words is "two trillion, two hundred eleven billion, thirty-one million, three hundred ten thousand, one hundred twenty-three".