131011212121 has 8 divisors (see below), whose sum is σ = 133238412000. Its totient is φ = 128784234720.

The previous prime is 131011212109. The next prime is 131011212169. The reversal of 131011212121 is 121212110131.

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 131011212121 - 2²¹ = 131009114969 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131011212095 and 131011212104.

It is not an unprimeable number, because it can be changed into a prime (131011212191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1497301 + ... + 1582381.

It is an arithmetic number, because the mean of its divisors is an integer number (16654801500).

Almost surely, 2^131011212121 is an apocalyptic number.

It is an amenable number.

131011212121 is a deficient number, since it is larger than the sum of its proper divisors (2227199879).

131011212121 is an equidigital number, since it uses as much as digits as its factorization.

131011212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111239.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 131011212121 its reverse (121212110131), we get a palindrome (252223322252).

The spelling of 131011212121 in words is "one hundred thirty-one billion, eleven million, two hundred twelve thousand, one hundred twenty-one".