113032131221 has 2 divisors, whose sum is σ = 113032131222. Its totient is φ = 113032131220.

The previous prime is 113032131217. The next prime is 113032131229. The reversal of 113032131221 is 122131230311.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92385602500 + 20646528721 = 303950^2 + 143689^2 .

It is an emirp because it is prime and its reverse (122131230311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 113032131221 - 2² = 113032131217 is a prime.

It is a super-2 number, since 2×113032131221² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 113032131193 and 113032131202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113032131229) 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 as a sum of consecutive naturals, namely, 56516065610 + 56516065611.

It is an arithmetic number, because the mean of its divisors is an integer number (56516065611).

Almost surely, 2^113032131221 is an apocalyptic number.

It is an amenable number.

113032131221 is a deficient number, since it is larger than the sum of its proper divisors (1).

113032131221 is an equidigital number, since it uses as much as digits as its factorization.

113032131221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 113032131221 its reverse (122131230311), we get a palindrome (235163361532).

The spelling of 113032131221 in words is "one hundred thirteen billion, thirty-two million, one hundred thirty-one thousand, two hundred twenty-one".