211211222222123 has 8 divisors (see below), whose sum is σ = 211586047428000. Its totient is φ = 210836427379200.

The previous prime is 211211222222093. The next prime is 211211222222129. The reversal of 211211222222123 is 321222222112112.

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

It is a cyclic number.

It is not a de Polignac number, because 211211222222123 - 2²⁸ = 211210953786667 is a prime.

It is a super-2 number, since 2×211211222222123² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211211222222092 and 211211222222101.

It is not an unprimeable number, because it can be changed into a prime (211211222222129) 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, 6356753 + ... + 21513501.

It is an arithmetic number, because the mean of its divisors is an integer number (26448255928500).

Almost surely, 2^{211211222222123} is an apocalyptic number.

211211222222123 is a deficient number, since it is larger than the sum of its proper divisors (374825205877).

211211222222123 is a wasteful number, since it uses less digits than its factorization.

211211222222123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15181477.

The product of its digits is 1536, while the sum is 26.

Adding to 211211222222123 its reverse (321222222112112), we get a palindrome (532433444334235).

The spelling of 211211222222123 in words is "two hundred eleven trillion, two hundred eleven billion, two hundred twenty-two million, two hundred twenty-two thousand, one hundred twenty-three".