211001112231 has 128 divisors (see below), whose sum is σ = 365334767616. Its totient is φ = 105345515520.

The previous prime is 211001112173. The next prime is 211001112239. The reversal of 211001112231 is 132211100112.

It is not a de Polignac number, because 211001112231 - 2⁹ = 211001111719 is a prime.

It is a super-2 number, since 2×211001112231² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211001112231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211001112239) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 238958916 + ... + 238959798.

It is an arithmetic number, because the mean of its divisors is an integer number (2854177872).

Almost surely, 2^211001112231 is an apocalyptic number.

211001112231 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

211001112231 is a deficient number, since it is larger than the sum of its proper divisors (154333655385).

211001112231 is a wasteful number, since it uses less digits than its factorization.

211001112231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1561.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 211001112231 its reverse (132211100112), we get a palindrome (343212212343).

The spelling of 211001112231 in words is "two hundred eleven billion, one million, one hundred twelve thousand, two hundred thirty-one".