21001000112 has 10 divisors (see below), whose sum is σ = 40689437748. Its totient is φ = 10500500048.

The previous prime is 21001000079. The next prime is 21001000129. The reversal of 21001000112 is 21100010012.

It is a super-3 number, since 3×21001000112³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a self number, because there is not a number n which added to its sum of digits gives 21001000112.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656281238 + ... + 656281269.

Almost surely, 2^21001000112 is an apocalyptic number.

It is an amenable number.

21001000112 is a deficient number, since it is larger than the sum of its proper divisors (19688437636).

21001000112 is a wasteful number, since it uses less digits than its factorization.

21001000112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1312562515 (or 1312562509 counting only the distinct ones).

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

Adding to 21001000112 its reverse (21100010012), we get a palindrome (42101010124).

The spelling of 21001000112 in words is "twenty-one billion, one million, one hundred twelve", and thus it is an aban number.