1105016821 has 8 divisors (see below), whose sum is σ = 1116862560. Its totient is φ = 1093202352.

The previous prime is 1105016819. The next prime is 1105016827. The reversal of 1105016821 is 1286105011.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1105016821 - 2¹ = 1105016819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1105016827) 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 7 ways as a sum of consecutive naturals, for example, 67026 + ... + 81868.

It is an arithmetic number, because the mean of its divisors is an integer number (139607820).

Almost surely, 2^1105016821 is an apocalyptic number.

It is an amenable number.

1105016821 is a deficient number, since it is larger than the sum of its proper divisors (11845739).

1105016821 is a wasteful number, since it uses less digits than its factorization.

1105016821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15635.

The product of its (nonzero) digits is 480, while the sum is 25.

The square root of 1105016821 is about 33241.7932879681. The cubic root of 1105016821 is about 1033.8470583165.

The spelling of 1105016821 in words is "one billion, one hundred five million, sixteen thousand, eight hundred twenty-one".