211111232131 has 8 divisors (see below), whose sum is σ = 215406998784. Its totient is φ = 206842398720.

The previous prime is 211111232093. The next prime is 211111232147. The reversal of 211111232131 is 131232111112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 211111232131 - 2¹⁷ = 211111101059 is a prime.

It is a super-2 number, since 2×211111232131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211111232099 and 211111232108.

It is not an unprimeable number, because it can be changed into a prime (211111233131) 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 7 ways as a sum of consecutive naturals, for example, 6717475 + ... + 6748828.

It is an arithmetic number, because the mean of its divisors is an integer number (26925874848).

Almost surely, 2^211111232131 is an apocalyptic number.

211111232131 is a deficient number, since it is larger than the sum of its proper divisors (4295766653).

211111232131 is a wasteful number, since it uses less digits than its factorization.

211111232131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13466621.

The product of its digits is 72, while the sum is 19.

Adding to 211111232131 its reverse (131232111112), we get a palindrome (342343343243).

The spelling of 211111232131 in words is "two hundred eleven billion, one hundred eleven million, two hundred thirty-two thousand, one hundred thirty-one".