201211122123 has 12 divisors (see below), whose sum is σ = 317059950168. Its totient is φ = 121946134560.

The previous prime is 201211122107. The next prime is 201211122127. The reversal of 201211122123 is 321221112102.

It is not a de Polignac number, because 201211122123 - 2⁴ = 201211122107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201211122096 and 201211122105.

It is not an unprimeable number, because it can be changed into a prime (201211122127) 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, 1016217690 + ... + 1016217887.

It is an arithmetic number, because the mean of its divisors is an integer number (26421662514).

Almost surely, 2^201211122123 is an apocalyptic number.

201211122123 is a deficient number, since it is larger than the sum of its proper divisors (115848828045).

201211122123 is a wasteful number, since it uses less digits than its factorization.

201211122123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2032435594 (or 2032435591 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 201211122123 its reverse (321221112102), we get a palindrome (522432234225).

The spelling of 201211122123 in words is "two hundred one billion, two hundred eleven million, one hundred twenty-two thousand, one hundred twenty-three".