1020012105 has 32 divisors (see below), whose sum is σ = 1871299584. Its totient is φ = 464757696.

The previous prime is 1020012013. The next prime is 1020012107. The reversal of 1020012105 is 5012100201.

It is not a de Polignac number, because 1020012105 - 2¹⁰ = 1020011081 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1020012107) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16414 + ... + 48056.

It is an arithmetic number, because the mean of its divisors is an integer number (58478112).

Almost surely, 2^1020012105 is an apocalyptic number.

1020012105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1020012105 is a deficient number, since it is larger than the sum of its proper divisors (851287479).

1020012105 is a wasteful number, since it uses less digits than its factorization.

1020012105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31965.

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 1020012105 is about 31937.6283559065. The cubic root of 1020012105 is about 1006.6266916254.

Adding to 1020012105 its reverse (5012100201), we get a palindrome (6032112306).

The spelling of 1020012105 in words is "one billion, twenty million, twelve thousand, one hundred five".