211122113011 has 4 divisors (see below), whose sum is σ = 211379266224. Its totient is φ = 210864959800.

The previous prime is 211122113009. The next prime is 211122113023. The reversal of 211122113011 is 110311221112.

It is a happy number.

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 211122113011 - 2¹ = 211122113009 is a prime.

It is a super-2 number, since 2×211122113011² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211122183011) 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, 128575375 + ... + 128577016.

It is an arithmetic number, because the mean of its divisors is an integer number (52844816556).

Almost surely, 2^211122113011 is an apocalyptic number.

211122113011 is a deficient number, since it is larger than the sum of its proper divisors (257153213).

211122113011 is an equidigital number, since it uses as much as digits as its factorization.

211122113011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257153212.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 211122113011 its reverse (110311221112), we get a palindrome (321433334123).

The spelling of 211122113011 in words is "two hundred eleven billion, one hundred twenty-two million, one hundred thirteen thousand, eleven".