211222001077 has 2 divisors, whose sum is σ = 211222001078. Its totient is φ = 211222001076.

The previous prime is 211222001027. The next prime is 211222001099. The reversal of 211222001077 is 770100222112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 162369508401 + 48852492676 = 402951^2 + 221026^2 .

It is a cyclic number.

It is not a de Polignac number, because 211222001077 - 2¹¹ = 211221999029 is a prime.

It is a super-2 number, since 2×211222001077² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211222001027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105611000538 + 105611000539.

It is an arithmetic number, because the mean of its divisors is an integer number (105611000539).

Almost surely, 2^211222001077 is an apocalyptic number.

It is an amenable number.

211222001077 is a deficient number, since it is larger than the sum of its proper divisors (1).

211222001077 is an equidigital number, since it uses as much as digits as its factorization.

211222001077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 784, while the sum is 25.

Adding to 211222001077 its reverse (770100222112), we get a palindrome (981322223189).

The spelling of 211222001077 in words is "two hundred eleven billion, two hundred twenty-two million, one thousand, seventy-seven".