221211120221071 has 2 divisors, whose sum is σ = 221211120221072. Its totient is φ = 221211120221070.

The previous prime is 221211120221053. The next prime is 221211120221141. The reversal of 221211120221071 is 170122021112122.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221211120221071 - 2²³ = 221211111832463 is a prime.

It is a super-2 number, since 2×221211120221071² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221211120221011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110605560110535 + 110605560110536.

It is an arithmetic number, because the mean of its divisors is an integer number (110605560110536).

Almost surely, 2^{221211120221071} is an apocalyptic number.

221211120221071 is a deficient number, since it is larger than the sum of its proper divisors (1).

221211120221071 is an equidigital number, since it uses as much as digits as its factorization.

221211120221071 is an odious number, because the sum of its binary digits is odd.

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

Adding to 221211120221071 its reverse (170122021112122), we get a palindrome (391333141333193).

The spelling of 221211120221071 in words is "two hundred twenty-one trillion, two hundred eleven billion, one hundred twenty million, two hundred twenty-one thousand, seventy-one".