113321316421 has 2 divisors, whose sum is σ = 113321316422. Its totient is φ = 113321316420.

The previous prime is 113321316389. The next prime is 113321316467. The reversal of 113321316421 is 124613123311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58617252100 + 54704064321 = 242110^2 + 233889^2 .

It is a cyclic number.

It is not a de Polignac number, because 113321316421 - 2⁵ = 113321316389 is a prime.

It is a super-3 number, since 3×113321316421³ (a number of 34 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 113321316421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113321326421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56660658210 + 56660658211.

It is an arithmetic number, because the mean of its divisors is an integer number (56660658211).

Almost surely, 2^113321316421 is an apocalyptic number.

It is an amenable number.

113321316421 is a deficient number, since it is larger than the sum of its proper divisors (1).

113321316421 is an equidigital number, since it uses as much as digits as its factorization.

113321316421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 28.

Adding to 113321316421 its reverse (124613123311), we get a palindrome (237934439732).

The spelling of 113321316421 in words is "one hundred thirteen billion, three hundred twenty-one million, three hundred sixteen thousand, four hundred twenty-one".