1105650021 has 16 divisors (see below), whose sum is σ = 1730336384. Its totient is φ = 614723904.

The previous prime is 1105650017. The next prime is 1105650041. The reversal of 1105650021 is 1200565011.

It is not a de Polignac number, because 1105650021 - 2² = 1105650017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 1105650021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1105650001) 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, 710710 + ... + 712263.

It is an arithmetic number, because the mean of its divisors is an integer number (108146024).

Almost surely, 2^1105650021 is an apocalyptic number.

It is an amenable number.

1105650021 is a deficient number, since it is larger than the sum of its proper divisors (624686363).

1105650021 is a wasteful number, since it uses less digits than its factorization.

1105650021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1423020.

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 1105650021 is about 33251.3160792171. The cubic root of 1105650021 is about 1034.0444933072.

The spelling of 1105650021 in words is "one billion, one hundred five million, six hundred fifty thousand, twenty-one".