131212211 has 8 divisors (see below), whose sum is σ = 146178480. Its totient is φ = 116942112.

The previous prime is 131212199. The next prime is 131212223. The reversal of 131212211 is 112212131.

It is an interprime number because it is at equal distance from previous prime (131212199) and next prime (131212223).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131212211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131212261) 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, 173645 + ... + 174398.

It is an arithmetic number, because the mean of its divisors is an integer number (18272310).

Almost surely, 2^131212211 is an apocalyptic number.

131212211 is a deficient number, since it is larger than the sum of its proper divisors (14966269).

131212211 is a wasteful number, since it uses less digits than its factorization.

131212211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348085.

The product of its digits is 24, while the sum is 14.

The square root of 131212211 is about 11454.7898714904. The cubic root of 131212211 is about 508.1494008980.

Adding to 131212211 its reverse (112212131), we get a palindrome (243424342).

The spelling of 131212211 in words is "one hundred thirty-one million, two hundred twelve thousand, two hundred eleven".