211231122011 has 8 divisors (see below), whose sum is σ = 259976765664. Its totient is φ = 167127920640.

The previous prime is 211231121891. The next prime is 211231122017. The reversal of 211231122011 is 110221132112.

It is a happy number.

211231122011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211231122011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (211231122017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1160610470 + ... + 1160610651.

It is an arithmetic number, because the mean of its divisors is an integer number (32497095708).

Almost surely, 2^211231122011 is an apocalyptic number.

211231122011 is a deficient number, since it is larger than the sum of its proper divisors (48745643653).

211231122011 is a wasteful number, since it uses less digits than its factorization.

211231122011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2321221141.

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

Adding to 211231122011 its reverse (110221132112), we get a palindrome (321452254123).

The spelling of 211231122011 in words is "two hundred eleven billion, two hundred thirty-one million, one hundred twenty-two thousand, eleven".