112131200021 has 2 divisors, whose sum is σ = 112131200022. Its totient is φ = 112131200020.

The previous prime is 112131199993. The next prime is 112131200023. The reversal of 112131200021 is 120002131211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97225476100 + 14905723921 = 311810^2 + 122089^2 .

It is an emirp because it is prime and its reverse (120002131211) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-112131200021 is a prime.

Together with 112131200023, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 112131199969 and 112131200005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (112131200023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56065600010 + 56065600011.

It is an arithmetic number, because the mean of its divisors is an integer number (56065600011).

Almost surely, 2^112131200021 is an apocalyptic number.

It is an amenable number.

112131200021 is a deficient number, since it is larger than the sum of its proper divisors (1).

112131200021 is an equidigital number, since it uses as much as digits as its factorization.

112131200021 is an evil number, because the sum of its binary digits is even.

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

Adding to 112131200021 its reverse (120002131211), we get a palindrome (232133331232).

The spelling of 112131200021 in words is "one hundred twelve billion, one hundred thirty-one million, two hundred thousand, twenty-one".