221232013109 has 2 divisors, whose sum is σ = 221232013110. Its totient is φ = 221232013108.

The previous prime is 221232013099. The next prime is 221232013129. The reversal of 221232013109 is 901310232122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 173543062225 + 47688950884 = 416585^2 + 218378^2 .

It is a cyclic number.

It is not a de Polignac number, because 221232013109 - 2³² = 216937045813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221232013129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110616006554 + 110616006555.

It is an arithmetic number, because the mean of its divisors is an integer number (110616006555).

Almost surely, 2^221232013109 is an apocalyptic number.

It is an amenable number.

221232013109 is a deficient number, since it is larger than the sum of its proper divisors (1).

221232013109 is an equidigital number, since it uses as much as digits as its factorization.

221232013109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

It can be divided in two parts, 221232013 and 109, that added together give a palindrome (221232122).

The spelling of 221232013109 in words is "two hundred twenty-one billion, two hundred thirty-two million, thirteen thousand, one hundred nine".