211331323131 has 32 divisors (see below), whose sum is σ = 296116369920. Its totient is φ = 133805278464.

The previous prime is 211331323127. The next prime is 211331323169. The reversal of 211331323131 is 131323133112.

It is not a de Polignac number, because 211331323131 - 2² = 211331323127 is a prime.

It is a super-2 number, since 2×211331323131² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211331323111) 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, 16492255 + ... + 16505063.

It is an arithmetic number, because the mean of its divisors is an integer number (9253636560).

Almost surely, 2^211331323131 is an apocalyptic number.

211331323131 is a deficient number, since it is larger than the sum of its proper divisors (84785046789).

211331323131 is a wasteful number, since it uses less digits than its factorization.

211331323131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14515.

The product of its digits is 972, while the sum is 24.

Adding to 211331323131 its reverse (131323133112), we get a palindrome (342654456243).

The spelling of 211331323131 in words is "two hundred eleven billion, three hundred thirty-one million, three hundred twenty-three thousand, one hundred thirty-one".