2211217121123 has 4 divisors (see below), whose sum is σ = 2233110360048. Its totient is φ = 2189323882200.

The previous prime is 2211217121119. The next prime is 2211217121147. The reversal of 2211217121123 is 3211217121122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2211217121123 - 2² = 2211217121119 is a prime.

It is a super-2 number, since 2×2211217121123² (a number of 25 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 = 2211217121092 and 2211217121101.

It is not an unprimeable number, because it can be changed into a prime (2211217121173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10946619311 + ... + 10946619512.

It is an arithmetic number, because the mean of its divisors is an integer number (558277590012).

Almost surely, 2^{2211217121123} is an apocalyptic number.

2211217121123 is a deficient number, since it is larger than the sum of its proper divisors (21893238925).

2211217121123 is a wasteful number, since it uses less digits than its factorization.

2211217121123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21893238924.

The product of its digits is 672, while the sum is 26.

Subtracting 2211217121123 from its reverse (3211217121122), we obtain a palindrome (999999999999).

The spelling of 2211217121123 in words is "two trillion, two hundred eleven billion, two hundred seventeen million, one hundred twenty-one thousand, one hundred twenty-three".