113212454521 has 2 divisors, whose sum is σ = 113212454522. Its totient is φ = 113212454520.

The previous prime is 113212454473. The next prime is 113212454587. The reversal of 113212454521 is 125454212311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84027515625 + 29184938896 = 289875^2 + 170836^2 .

It is an emirp because it is prime and its reverse (125454212311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 113212454521 - 2¹¹ = 113212452473 is a prime.

It is not a weakly prime, because it can be changed into another prime (113212454321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56606227260 + 56606227261.

It is an arithmetic number, because the mean of its divisors is an integer number (56606227261).

Almost surely, 2^113212454521 is an apocalyptic number.

It is an amenable number.

113212454521 is a deficient number, since it is larger than the sum of its proper divisors (1).

113212454521 is an equidigital number, since it uses as much as digits as its factorization.

113212454521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9600, while the sum is 31.

Adding to 113212454521 its reverse (125454212311), we get a palindrome (238666666832).

The spelling of 113212454521 in words is "one hundred thirteen billion, two hundred twelve million, four hundred fifty-four thousand, five hundred twenty-one".