113214021581 has 2 divisors, whose sum is σ = 113214021582. Its totient is φ = 113214021580.

The previous prime is 113214021563. The next prime is 113214021611. The reversal of 113214021581 is 185120412311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113195238025 + 18783556 = 336445^2 + 4334^2 .

It is a cyclic number.

It is not a de Polignac number, because 113214021581 - 2³⁴ = 96034152397 is a prime.

It is a super-3 number, since 3×113214021581³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113214021551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56607010790 + 56607010791.

It is an arithmetic number, because the mean of its divisors is an integer number (56607010791).

Almost surely, 2^113214021581 is an apocalyptic number.

It is an amenable number.

113214021581 is a deficient number, since it is larger than the sum of its proper divisors (1).

113214021581 is an equidigital number, since it uses as much as digits as its factorization.

113214021581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 29.

Adding to 113214021581 its reverse (185120412311), we get a palindrome (298334433892).

The spelling of 113214021581 in words is "one hundred thirteen billion, two hundred fourteen million, twenty-one thousand, five hundred eighty-one".