221213104322101 has 4 divisors (see below), whose sum is σ = 221213545932652. Its totient is φ = 221212662711552.

The previous prime is 221213104322029. The next prime is 221213104322167. The reversal of 221213104322101 is 101223401312122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 53329281236100 + 167883823086001 = 7302690^2 + 12956999^2 .

It is a cyclic number.

It is not a de Polignac number, because 221213104322101 - 2¹¹ = 221213104320053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221213104322191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220053036 + ... + 221056021.

It is an arithmetic number, because the mean of its divisors is an integer number (55303386483163).

Almost surely, 2^{221213104322101} is an apocalyptic number.

It is an amenable number.

221213104322101 is a deficient number, since it is larger than the sum of its proper divisors (441610551).

221213104322101 is an equidigital number, since it uses as much as digits as its factorization.

221213104322101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441610550.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 221213104322101 its reverse (101223401312122), we get a palindrome (322436505634223).

The spelling of 221213104322101 in words is "two hundred twenty-one trillion, two hundred thirteen billion, one hundred four million, three hundred twenty-two thousand, one hundred one".