221002121102201 has 2 divisors, whose sum is σ = 221002121102202. Its totient is φ = 221002121102200.

The previous prime is 221002121102101. The next prime is 221002121102233. The reversal of 221002121102201 is 102201121200122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112003614246976 + 108998506855225 = 10583176^2 + 10440235^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221002121102201 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221002121102201.

It is not a weakly prime, because it can be changed into another prime (221002121102101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110501060551100 + 110501060551101.

It is an arithmetic number, because the mean of its divisors is an integer number (110501060551101).

Almost surely, 2^{221002121102201} is an apocalyptic number.

It is an amenable number.

221002121102201 is a deficient number, since it is larger than the sum of its proper divisors (1).

221002121102201 is an equidigital number, since it uses as much as digits as its factorization.

221002121102201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221002121102201 its reverse (102201121200122), we get a palindrome (323203242302323).

The spelling of 221002121102201 in words is "two hundred twenty-one trillion, two billion, one hundred twenty-one million, one hundred two thousand, two hundred one".