112221200120021 has 2 divisors, whose sum is σ = 112221200120022. Its totient is φ = 112221200120020.

The previous prime is 112221200119879. The next prime is 112221200120041. The reversal of 112221200120021 is 120021002122211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108885864955921 + 3335335164100 = 10434839^2 + 1826290^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-112221200120021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (112221200120041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56110600060010 + 56110600060011.

It is an arithmetic number, because the mean of its divisors is an integer number (56110600060011).

Almost surely, 2^{112221200120021} is an apocalyptic number.

It is an amenable number.

112221200120021 is a deficient number, since it is larger than the sum of its proper divisors (1).

112221200120021 is an equidigital number, since it uses as much as digits as its factorization.

112221200120021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 112221200120021 its reverse (120021002122211), we get a palindrome (232242202242232).

The spelling of 112221200120021 in words is "one hundred twelve trillion, two hundred twenty-one billion, two hundred million, one hundred twenty thousand, twenty-one".