211203120123 has 12 divisors (see below), whose sum is σ = 305282022448. Its totient is φ = 140704765200.

The previous prime is 211203120113. The next prime is 211203120137. The reversal of 211203120123 is 321021302112.

211203120123 is a `hidden beast` number, since 211 + 20 + 312 + 0 + 123 = 666.

It is not a de Polignac number, because 211203120123 - 2⁶ = 211203120059 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211203120096 and 211203120105.

It is not an unprimeable number, because it can be changed into a prime (211203120103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8095828 + ... + 8121873.

Almost surely, 2^211203120123 is an apocalyptic number.

211203120123 is a deficient number, since it is larger than the sum of its proper divisors (94078902325).

211203120123 is a wasteful number, since it uses less digits than its factorization.

211203120123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16219154 (or 16219151 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 211203120123 its reverse (321021302112), we get a palindrome (532224422235).

The spelling of 211203120123 in words is "two hundred eleven billion, two hundred three million, one hundred twenty thousand, one hundred twenty-three".