131222211 has 8 divisors (see below), whose sum is σ = 175272720. Its totient is φ = 87326592.

The previous prime is 131222209. The next prime is 131222237. The reversal of 131222211 is 112222131.

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

It is not a de Polignac number, because 131222211 - 2¹ = 131222209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131222251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36730 + ... + 40143.

It is an arithmetic number, because the mean of its divisors is an integer number (21909090).

Almost surely, 2^131222211 is an apocalyptic number.

131222211 is a deficient number, since it is larger than the sum of its proper divisors (44050509).

131222211 is an equidigital number, since it uses as much as digits as its factorization.

131222211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77445.

The product of its digits is 48, while the sum is 15.

The square root of 131222211 is about 11455.2263617966. The cubic root of 131222211 is about 508.1623096684.

Adding to 131222211 its reverse (112222131), we get a palindrome (243444342).

The spelling of 131222211 in words is "one hundred thirty-one million, two hundred twenty-two thousand, two hundred eleven".