131012121 has 8 divisors (see below), whose sum is σ = 174763360. Its totient is φ = 87301152.

The previous prime is 131012113. The next prime is 131012173. The reversal of 131012121 is 121210131.

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

It is not a de Polignac number, because 131012121 - 2³ = 131012113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131012097 and 131012106.

It is not an unprimeable number, because it can be changed into a prime (131012521) 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, 1411 + ... + 16248.

It is an arithmetic number, because the mean of its divisors is an integer number (21845420).

Almost surely, 2^131012121 is an apocalyptic number.

It is an amenable number.

131012121 is a deficient number, since it is larger than the sum of its proper divisors (43751239).

131012121 is a wasteful number, since it uses less digits than its factorization.

131012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20135.

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

The square root of 131012121 is about 11446.0526383553. The cubic root of 131012121 is about 507.8909713419.

Adding to 131012121 its reverse (121210131), we get a palindrome (252222252).

It can be divided in two parts, 1310 and 12121, that added together give a palindrome (13431).

The spelling of 131012121 in words is "one hundred thirty-one million, twelve thousand, one hundred twenty-one".