10721105 has 16 divisors (see below), whose sum is σ = 13685760. Its totient is φ = 8044608.

The previous prime is 10721099. The next prime is 10721107. The reversal of 10721105 is 50112701.

10721105 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 10721105 - 2⁴ = 10721089 is a prime.

It is a super-2 number, since 2×10721105² = 229884184842050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10721107) 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, 5216 + ... + 6974.

It is an arithmetic number, because the mean of its divisors is an integer number (855360).

Almost surely, 2^10721105 is an apocalyptic number.

It is an amenable number.

10721105 is a deficient number, since it is larger than the sum of its proper divisors (2964655).

10721105 is a wasteful number, since it uses less digits than its factorization.

10721105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1840.

The product of its (nonzero) digits is 70, while the sum is 17.

The square root of 10721105 is about 3274.3098509457. The cubic root of 10721105 is about 220.5023301087.

Adding to 10721105 its reverse (50112701), we get a palindrome (60833806).

It can be divided in two parts, 107 and 21105, that added together give a palindrome (21212).

The spelling of 10721105 in words is "ten million, seven hundred twenty-one thousand, one hundred five".