211121022113 has 4 divisors (see below), whose sum is σ = 211123934868. Its totient is φ = 211118109360.

The previous prime is 211121022109. The next prime is 211121022149. The reversal of 211121022113 is 311220121112.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 47789457664 + 163331564449 = 218608^2 + 404143^2 .

It is a cyclic number.

It is not a de Polignac number, because 211121022113 - 2² = 211121022109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211121022091 and 211121022100.

It is not an unprimeable number, because it can be changed into a prime (211121022913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1344806 + ... + 1493567.

It is an arithmetic number, because the mean of its divisors is an integer number (52780983717).

Almost surely, 2^211121022113 is an apocalyptic number.

It is an amenable number.

211121022113 is a deficient number, since it is larger than the sum of its proper divisors (2912755).

211121022113 is an equidigital number, since it uses as much as digits as its factorization.

211121022113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2912754.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 211121022113 its reverse (311220121112), we get a palindrome (522341143225).

The spelling of 211121022113 in words is "two hundred eleven billion, one hundred twenty-one million, twenty-two thousand, one hundred thirteen".