211121033123 has 64 divisors (see below), whose sum is σ = 288964838400. Its totient is φ = 148922841600.

The previous prime is 211121033113. The next prime is 211121033129. The reversal of 211121033123 is 321330121112.

It is a happy number.

It is not a de Polignac number, because 211121033123 - 2¹² = 211121029027 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211121033095 and 211121033104.

It is not an unprimeable number, because it can be changed into a prime (211121033129) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 21305336 + ... + 21315242.

It is an arithmetic number, because the mean of its divisors is an integer number (4515075600).

Almost surely, 2^211121033123 is an apocalyptic number.

211121033123 is a deficient number, since it is larger than the sum of its proper divisors (77843805277).

211121033123 is a wasteful number, since it uses less digits than its factorization.

211121033123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10348.

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

Adding to 211121033123 its reverse (321330121112), we get a palindrome (532451154235).

The spelling of 211121033123 in words is "two hundred eleven billion, one hundred twenty-one million, thirty-three thousand, one hundred twenty-three".