131213111 has 8 divisors (see below), whose sum is σ = 136347648. Its totient is φ = 126135000.

The previous prime is 131213101. The next prime is 131213129. The reversal of 131213111 is 111312131.

It is a happy number.

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 131213111 - 2¹⁴ = 131196727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131213101) 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, 9335 + ... + 18696.

It is an arithmetic number, because the mean of its divisors is an integer number (17043456).

Almost surely, 2^131213111 is an apocalyptic number.

131213111 is a deficient number, since it is larger than the sum of its proper divisors (5134537).

131213111 is a wasteful number, since it uses less digits than its factorization.

131213111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28213.

The product of its digits is 18, while the sum is 14.

The square root of 131213111 is about 11454.8291562991. The cubic root of 131213111 is about 508.1505627142.

Adding to 131213111 its reverse (111312131), we get a palindrome (242525242).

It can be divided in two parts, 1312131 and 11, that multiplied together give a palindrome (14433441).

The spelling of 131213111 in words is "one hundred thirty-one million, two hundred thirteen thousand, one hundred eleven".