1012105111 has 4 divisors (see below), whose sum is σ = 1012284000. Its totient is φ = 1011926224.

The previous prime is 1012105109. The next prime is 1012105139. The reversal of 1012105111 is 1115012101.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1012105111 - 2¹ = 1012105109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1012105091 and 1012105100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012105711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80671 + ... + 92368.

It is an arithmetic number, because the mean of its divisors is an integer number (253071000).

Almost surely, 2^1012105111 is an apocalyptic number.

1012105111 is a deficient number, since it is larger than the sum of its proper divisors (178889).

1012105111 is an equidigital number, since it uses as much as digits as its factorization.

1012105111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178888.

The product of its (nonzero) digits is 10, while the sum is 13.

The square root of 1012105111 is about 31813.5994662660. The cubic root of 1012105111 is about 1004.0188640948.

Adding to 1012105111 its reverse (1115012101), we get a palindrome (2127117212).

The spelling of 1012105111 in words is "one billion, twelve million, one hundred five thousand, one hundred eleven".