221002121071 has 2 divisors, whose sum is σ = 221002121072. Its totient is φ = 221002121070.

The previous prime is 221002121069. The next prime is 221002121129. The reversal of 221002121071 is 170121200122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221002121071 - 2¹ = 221002121069 is a prime.

Together with 221002121069, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221002121371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110501060535 + 110501060536.

It is an arithmetic number, because the mean of its divisors is an integer number (110501060536).

Almost surely, 2^221002121071 is an apocalyptic number.

221002121071 is a deficient number, since it is larger than the sum of its proper divisors (1).

221002121071 is an equidigital number, since it uses as much as digits as its factorization.

221002121071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 19.

Adding to 221002121071 its reverse (170121200122), we get a palindrome (391123321193).

The spelling of 221002121071 in words is "two hundred twenty-one billion, two million, one hundred twenty-one thousand, seventy-one".