1012727721 has 16 divisors (see below), whose sum is σ = 1423385600. Its totient is φ = 638711568.

The previous prime is 1012727693. The next prime is 1012727831. The reversal of 1012727721 is 1277272101.

It is not a de Polignac number, because 1012727721 - 2¹⁵ = 1012694953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1012722721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29220 + ... + 53658.

It is an arithmetic number, because the mean of its divisors is an integer number (88961600).

Almost surely, 2^1012727721 is an apocalyptic number.

It is an amenable number.

1012727721 is a deficient number, since it is larger than the sum of its proper divisors (410657879).

1012727721 is a wasteful number, since it uses less digits than its factorization.

1012727721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25188.

The product of its (nonzero) digits is 2744, while the sum is 30.

The square root of 1012727721 is about 31823.3832425152. The cubic root of 1012727721 is about 1004.2247004386.

Adding to 1012727721 its reverse (1277272101), we get a palindrome (2289999822).

The spelling of 1012727721 in words is "one billion, twelve million, seven hundred twenty-seven thousand, seven hundred twenty-one".