211222221001117 has 2 divisors, whose sum is σ = 211222221001118. Its totient is φ = 211222221001116.

The previous prime is 211222221001091. The next prime is 211222221001147. The reversal of 211222221001117 is 711100122222112.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 187315929968281 + 23906291032836 = 13686341^2 + 4889406^2 .

It is a cyclic number.

It is not a de Polignac number, because 211222221001117 - 2³⁹ = 210672465187229 is a prime.

It is a super-2 number, since 2×211222221001117² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211222221001091 and 211222221001100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211222221001147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105611110500558 + 105611110500559.

It is an arithmetic number, because the mean of its divisors is an integer number (105611110500559).

Almost surely, 2^{211222221001117} is an apocalyptic number.

It is an amenable number.

211222221001117 is a deficient number, since it is larger than the sum of its proper divisors (1).

211222221001117 is an equidigital number, since it uses as much as digits as its factorization.

211222221001117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 25.

Adding to 211222221001117 its reverse (711100122222112), we get a palindrome (922322343223229).

The spelling of 211222221001117 in words is "two hundred eleven trillion, two hundred twenty-two billion, two hundred twenty-one million, one thousand, one hundred seventeen".