123120211143 has 4 divisors (see below), whose sum is σ = 164160281528. Its totient is φ = 82080140760.

The previous prime is 123120211129. The next prime is 123120211163. The reversal of 123120211143 is 341112021321.

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

It is not a de Polignac number, because 123120211143 - 2⁶ = 123120211079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123120211163) 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, 20520035188 + ... + 20520035193.

It is an arithmetic number, because the mean of its divisors is an integer number (41040070382).

Almost surely, 2^123120211143 is an apocalyptic number.

123120211143 is a deficient number, since it is larger than the sum of its proper divisors (41040070385).

123120211143 is an equidigital number, since it uses as much as digits as its factorization.

123120211143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41040070384.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 123120211143 its reverse (341112021321), we get a palindrome (464232232464).

The spelling of 123120211143 in words is "one hundred twenty-three billion, one hundred twenty million, two hundred eleven thousand, one hundred forty-three".