131212001 has 8 divisors (see below), whose sum is σ = 139065984. Its totient is φ = 123373120.

The previous prime is 131211989. The next prime is 131212019. The reversal of 131212001 is 100212131.

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 131212001 - 2¹⁰ = 131210977 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (131212021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17636 + ... + 23946.

It is an arithmetic number, because the mean of its divisors is an integer number (17383248).

Almost surely, 2^131212001 is an apocalyptic number.

It is an amenable number.

131212001 is a deficient number, since it is larger than the sum of its proper divisors (7853983).

131212001 is a wasteful number, since it uses less digits than its factorization.

131212001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7551.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 131212001 is about 11454.7807050157. The cubic root of 131212001 is about 508.1491298068.

Adding to 131212001 its reverse (100212131), we get a palindrome (231424132).

The spelling of 131212001 in words is "one hundred thirty-one million, two hundred twelve thousand, one".