2123066731 has 4 divisors (see below), whose sum is σ = 2123183232. Its totient is φ = 2122950232.

The previous prime is 2123066717. The next prime is 2123066761. The reversal of 2123066731 is 1376603212.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2123066731 - 2²⁷ = 1988849003 is a prime.

It is a super-3 number, since 3×2123066731³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2123066693 and 2123066702.

It is not an unprimeable number, because it can be changed into a prime (2123066761) 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, 24331 + ... + 69556.

It is an arithmetic number, because the mean of its divisors is an integer number (530795808).

Almost surely, 2^2123066731 is an apocalyptic number.

2123066731 is a deficient number, since it is larger than the sum of its proper divisors (116501).

2123066731 is an equidigital number, since it uses as much as digits as its factorization.

2123066731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116500.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 2123066731 is about 46076.7482685139. The cubic root of 2123066731 is about 1285.2507963299.

Adding to 2123066731 its reverse (1376603212), we get a palindrome (3499669943).

The spelling of 2123066731 in words is "two billion, one hundred twenty-three million, sixty-six thousand, seven hundred thirty-one".