20101112 has 8 divisors (see below), whose sum is σ = 37689600. Its totient is φ = 10050552.

The previous prime is 20101099. The next prime is 20101129. The reversal of 20101112 is 21110102.

It is a tau number, because it is divible by the number of its divisors (8).

It is a Harshad number since it is a multiple of its sum of digits (8), and also a Moran number because the ratio is a prime number: 2512639 = 20101112 / (2 + 0 + 1 + 0 + 1 + 1 + 1 + 2).

It is a self number, because there is not a number n which added to its sum of digits gives 20101112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1256312 + ... + 1256327.

It is an arithmetic number, because the mean of its divisors is an integer number (4711200).

Almost surely, 2^20101112 is an apocalyptic number.

It is an amenable number.

20101112 is a deficient number, since it is larger than the sum of its proper divisors (17588488).

20101112 is a wasteful number, since it uses less digits than its factorization.

20101112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2512645 (or 2512641 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 20101112 is about 4483.4263683036. The cubic root of 20101112 is about 271.8984266069.

Adding to 20101112 its reverse (21110102), we get a palindrome (41211214).

The spelling of 20101112 in words is "twenty million, one hundred one thousand, one hundred twelve".