21120001202117 has 2 divisors, whose sum is σ = 21120001202118. Its totient is φ = 21120001202116.

The previous prime is 21120001202029. The next prime is 21120001202123. The reversal of 21120001202117 is 71120210002112.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11926013000836 + 9193988201281 = 3453406^2 + 3032159^2 .

It is a cyclic number.

It is not a de Polignac number, because 21120001202117 - 2⁴⁰ = 20020489574341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21120001232117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560000601058 + 10560000601059.

It is an arithmetic number, because the mean of its divisors is an integer number (10560000601059).

Almost surely, 2^{21120001202117} is an apocalyptic number.

It is an amenable number.

21120001202117 is a deficient number, since it is larger than the sum of its proper divisors (1).

21120001202117 is an equidigital number, since it uses as much as digits as its factorization.

21120001202117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 20.

Adding to 21120001202117 its reverse (71120210002112), we get a palindrome (92240211204229).

The spelling of 21120001202117 in words is "twenty-one trillion, one hundred twenty billion, one million, two hundred two thousand, one hundred seventeen".