113220251251 has 4 divisors (see below), whose sum is σ = 113291956600. Its totient is φ = 113148545904.

The previous prime is 113220251201. The next prime is 113220251269. The reversal of 113220251251 is 152152022311.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 113220251251 - 2⁹ = 113220250739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (113220251201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35850306 + ... + 35853463.

It is an arithmetic number, because the mean of its divisors is an integer number (28322989150).

Almost surely, 2^113220251251 is an apocalyptic number.

113220251251 is a deficient number, since it is larger than the sum of its proper divisors (71705349).

113220251251 is an equidigital number, since it uses as much as digits as its factorization.

113220251251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71705348.

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 113220251251 its reverse (152152022311), we get a palindrome (265372273562).

The spelling of 113220251251 in words is "one hundred thirteen billion, two hundred twenty million, two hundred fifty-one thousand, two hundred fifty-one".