221122221071 has 2 divisors, whose sum is σ = 221122221072. Its totient is φ = 221122221070.

The previous prime is 221122221049. The next prime is 221122221091. The reversal of 221122221071 is 170122221122.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221122221071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221122221091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110561110535 + 110561110536.

It is an arithmetic number, because the mean of its divisors is an integer number (110561110536).

Almost surely, 2^221122221071 is an apocalyptic number.

221122221071 is a deficient number, since it is larger than the sum of its proper divisors (1).

221122221071 is an equidigital number, since it uses as much as digits as its factorization.

221122221071 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 23.

Adding to 221122221071 its reverse (170122221122), we get a palindrome (391244442193).

The spelling of 221122221071 in words is "two hundred twenty-one billion, one hundred twenty-two million, two hundred twenty-one thousand, seventy-one".