211131234401 has 16 divisors (see below), whose sum is σ = 225621492096. Its totient is φ = 197091328896.

The previous prime is 211131234367. The next prime is 211131234451. The reversal of 211131234401 is 104432131112.

It is a cyclic number.

It is not a de Polignac number, because 211131234401 - 2¹⁰ = 211131233377 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211131234451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1111661 + ... + 1287653.

It is an arithmetic number, because the mean of its divisors is an integer number (14101343256).

Almost surely, 2^211131234401 is an apocalyptic number.

It is an amenable number.

211131234401 is a deficient number, since it is larger than the sum of its proper divisors (14490257695).

211131234401 is a wasteful number, since it uses less digits than its factorization.

211131234401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177272.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 211131234401 its reverse (104432131112), we get a palindrome (315563365513).

The spelling of 211131234401 in words is "two hundred eleven billion, one hundred thirty-one million, two hundred thirty-four thousand, four hundred one".