20221211210117 has 2 divisors, whose sum is σ = 20221211210118. Its totient is φ = 20221211210116.

The previous prime is 20221211210021. The next prime is 20221211210129. The reversal of 20221211210117 is 71101211212202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12160347634561 + 8060863575556 = 3487169^2 + 2839166^2 .

It is a cyclic number.

It is not a de Polignac number, because 20221211210117 - 2²⁸ = 20220942774661 is a prime.

It is a super-2 number, since 2×20221211210117² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20221211210092 and 20221211210101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20221211200117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10110605605058 + 10110605605059.

It is an arithmetic number, because the mean of its divisors is an integer number (10110605605059).

Almost surely, 2^{20221211210117} is an apocalyptic number.

It is an amenable number.

20221211210117 is a deficient number, since it is larger than the sum of its proper divisors (1).

20221211210117 is an equidigital number, since it uses as much as digits as its factorization.

20221211210117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 23.

Adding to 20221211210117 its reverse (71101211212202), we get a palindrome (91322422422319).

The spelling of 20221211210117 in words is "twenty trillion, two hundred twenty-one billion, two hundred eleven million, two hundred ten thousand, one hundred seventeen".