131112001 has 2 divisors, whose sum is σ = 131112002. Its totient is φ = 131112000.

The previous prime is 131111993. The next prime is 131112013. The reversal of 131112001 is 100211131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131079601 + 32400 = 11449^2 + 180^2 .

It is an emirp because it is prime and its reverse (100211131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131112001 - 2³ = 131111993 is a prime.

It is not a weakly prime, because it can be changed into another prime (131112701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65556000 + 65556001.

It is an arithmetic number, because the mean of its divisors is an integer number (65556001).

Almost surely, 2^131112001 is an apocalyptic number.

It is an amenable number.

131112001 is a deficient number, since it is larger than the sum of its proper divisors (1).

131112001 is an equidigital number, since it uses as much as digits as its factorization.

131112001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6, while the sum is 10.

The square root of 131112001 is about 11450.4148833132. The cubic root of 131112001 is about 508.0200058771.

Adding to 131112001 its reverse (100211131), we get a palindrome (231323132).

The spelling of 131112001 in words is "one hundred thirty-one million, one hundred twelve thousand, one".