211131433121 has 32 divisors (see below), whose sum is σ = 261073010688. Its totient is φ = 166765547520.

The previous prime is 211131433103. The next prime is 211131433159. The reversal of 211131433121 is 121334131112.

It is a cyclic number.

It is not a de Polignac number, because 211131433121 - 2¹⁰ = 211131432097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (211131433171) 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, 1018145 + ... + 1207841.

It is an arithmetic number, because the mean of its divisors is an integer number (8158531584).

Almost surely, 2^211131433121 is an apocalyptic number.

It is an amenable number.

211131433121 is a deficient number, since it is larger than the sum of its proper divisors (49941577567).

211131433121 is a wasteful number, since it uses less digits than its factorization.

211131433121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189981.

The product of its digits is 432, while the sum is 23.

Adding to 211131433121 its reverse (121334131112), we get a palindrome (332465564233).

The spelling of 211131433121 in words is "two hundred eleven billion, one hundred thirty-one million, four hundred thirty-three thousand, one hundred twenty-one".