211231201122111 has 32 divisors (see below), whose sum is σ = 284659025511168. Its totient is φ = 139315782090240.

The previous prime is 211231201122091. The next prime is 211231201122131. The reversal of 211231201122111 is 111221102132112.

211231201122111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (211231201122091) and next prime (211231201122131).

It is not a de Polignac number, because 211231201122111 - 2²³ = 211231192733503 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211231201122131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 717201421 + ... + 717495881.

It is an arithmetic number, because the mean of its divisors is an integer number (8895594547224).

Almost surely, 2^{211231201122111} is an apocalyptic number.

211231201122111 is a deficient number, since it is larger than the sum of its proper divisors (73427824389057).

211231201122111 is a wasteful number, since it uses less digits than its factorization.

211231201122111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297591.

The product of its (nonzero) digits is 96, while the sum is 21.

Adding to 211231201122111 its reverse (111221102132112), we get a palindrome (322452303254223).

The spelling of 211231201122111 in words is "two hundred eleven trillion, two hundred thirty-one billion, two hundred one million, one hundred twenty-two thousand, one hundred eleven".