211011220123 has 8 divisors (see below), whose sum is σ = 230260495680. Its totient is φ = 191773017480.

The previous prime is 211011220097. The next prime is 211011220139. The reversal of 211011220123 is 321022110112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-211011220123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211011220097 and 211011220106.

It is not an unprimeable number, because it can be changed into a prime (211011220423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2728353 + ... + 2804626.

It is an arithmetic number, because the mean of its divisors is an integer number (28782561960).

Almost surely, 2^211011220123 is an apocalyptic number.

211011220123 is a deficient number, since it is larger than the sum of its proper divisors (19249275557).

211011220123 is a wasteful number, since it uses less digits than its factorization.

211011220123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5536457.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 211011220123 its reverse (321022110112), we get a palindrome (532033330235).

It can be divided in two parts, 211011 and 220123, that added together give a palindrome (431134).

The spelling of 211011220123 in words is "two hundred eleven billion, eleven million, two hundred twenty thousand, one hundred twenty-three".