113120321221 has 2 divisors, whose sum is σ = 113120321222. Its totient is φ = 113120321220.

The previous prime is 113120321219. The next prime is 113120321227. The reversal of 113120321221 is 122123021311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62843470596 + 50276850625 = 250686^2 + 224225^2 .

It is a cyclic number.

It is not a de Polignac number, because 113120321221 - 2¹ = 113120321219 is a prime.

Together with 113120321219, 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 (113120321227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56560160610 + 56560160611.

It is an arithmetic number, because the mean of its divisors is an integer number (56560160611).

Almost surely, 2^113120321221 is an apocalyptic number.

It is an amenable number.

113120321221 is a deficient number, since it is larger than the sum of its proper divisors (1).

113120321221 is an equidigital number, since it uses as much as digits as its factorization.

113120321221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 113120321221 its reverse (122123021311), we get a palindrome (235243342532).

The spelling of 113120321221 in words is "one hundred thirteen billion, one hundred twenty million, three hundred twenty-one thousand, two hundred twenty-one".