113127721 has 24 divisors (see below), whose sum is σ = 135432000. Its totient is φ = 94185504.

The previous prime is 113127713. The next prime is 113127727. The reversal of 113127721 is 127721311.

It is not a de Polignac number, because 113127721 - 2³ = 113127713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (113127727) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 314940 + ... + 315298.

It is an arithmetic number, because the mean of its divisors is an integer number (5643000).

Almost surely, 2^113127721 is an apocalyptic number.

It is an amenable number.

113127721 is a deficient number, since it is larger than the sum of its proper divisors (22304279).

113127721 is a wasteful number, since it uses less digits than its factorization.

113127721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541 (or 534 counting only the distinct ones).

The product of its digits is 588, while the sum is 25.

The square root of 113127721 is about 10636.1516066668. The cubic root of 113127721 is about 483.6408911584.

The spelling of 113127721 in words is "one hundred thirteen million, one hundred twenty-seven thousand, seven hundred twenty-one".