221434322101 has 4 divisors (see below), whose sum is σ = 221463024172. Its totient is φ = 221405620032.

The previous prime is 221434322093. The next prime is 221434322189. The reversal of 221434322101 is 101223434122.

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 113991315876 + 107443006225 = 337626^2 + 327785^2 .

It is a cyclic number.

It is not a de Polignac number, because 221434322101 - 2³ = 221434322093 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 (221434322201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14339460 + ... + 14354893.

It is an arithmetic number, because the mean of its divisors is an integer number (55365756043).

Almost surely, 2^221434322101 is an apocalyptic number.

It is an amenable number.

221434322101 is a deficient number, since it is larger than the sum of its proper divisors (28702071).

221434322101 is an equidigital number, since it uses as much as digits as its factorization.

221434322101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28702070.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 221434322101 its reverse (101223434122), we get a palindrome (322657756223).

The spelling of 221434322101 in words is "two hundred twenty-one billion, four hundred thirty-four million, three hundred twenty-two thousand, one hundred one".