1021105105 has 8 divisors (see below), whose sum is σ = 1227223872. Its totient is φ = 815618928.

The previous prime is 1021105103. The next prime is 1021105147. The reversal of 1021105105 is 5015011201.

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 1021105105 - 2¹ = 1021105103 is a prime.

It is a super-2 number, since 2×1021105105² = 2085311270914122050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021105103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154587 + ... + 161056.

It is an arithmetic number, because the mean of its divisors is an integer number (153402984).

Almost surely, 2^1021105105 is an apocalyptic number.

It is an amenable number.

1021105105 is a deficient number, since it is larger than the sum of its proper divisors (206118767).

1021105105 is an equidigital number, since it uses as much as digits as its factorization.

1021105105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316295.

The product of its (nonzero) digits is 50, while the sum is 16.

The square root of 1021105105 is about 31954.7352516024. The cubic root of 1021105105 is about 1006.9861155354.

Adding to 1021105105 its reverse (5015011201), we get a palindrome (6036116306).

The spelling of 1021105105 in words is "one billion, twenty-one million, one hundred five thousand, one hundred five".