113455227721 has 4 divisors (see below), whose sum is σ = 123769339344. Its totient is φ = 103141116100.

The previous prime is 113455227679. The next prime is 113455227749. The reversal of 113455227721 is 127722554311.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 127722554311 = 11 ⋅11611141301.

It is not a de Polignac number, because 113455227721 - 2¹⁷ = 113455096649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (113455227761) 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 in 3 ways as a sum of consecutive naturals, for example, 5157055795 + ... + 5157055816.

It is an arithmetic number, because the mean of its divisors is an integer number (30942334836).

Almost surely, 2^113455227721 is an apocalyptic number.

113455227721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

113455227721 is a deficient number, since it is larger than the sum of its proper divisors (10314111623).

113455227721 is a wasteful number, since it uses less digits than its factorization.

113455227721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10314111622.

The product of its digits is 117600, while the sum is 40.

The spelling of 113455227721 in words is "one hundred thirteen billion, four hundred fifty-five million, two hundred twenty-seven thousand, seven hundred twenty-one".