131213212111 has 4 divisors (see below), whose sum is σ = 131786195800. Its totient is φ = 130640228424.

The previous prime is 131213212103. The next prime is 131213212177. The reversal of 131213212111 is 111212312131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 131213212111 - 2³ = 131213212103 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 (131213212211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 286491501 + ... + 286491958.

It is an arithmetic number, because the mean of its divisors is an integer number (32946548950).

Almost surely, 2^131213212111 is an apocalyptic number.

131213212111 is a deficient number, since it is larger than the sum of its proper divisors (572983689).

131213212111 is an equidigital number, since it uses as much as digits as its factorization.

131213212111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572983688.

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

Adding to 131213212111 its reverse (111212312131), we get a palindrome (242425524242).

The spelling of 131213212111 in words is "one hundred thirty-one billion, two hundred thirteen million, two hundred twelve thousand, one hundred eleven".