112100010021 has 20 divisors (see below), whose sum is σ = 167573624064. Its totient is φ = 74681757000.

The previous prime is 112100009993. The next prime is 112100010053. The reversal of 112100010021 is 120010001211.

It is a happy number.

It is not a de Polignac number, because 112100010021 - 2¹¹ = 112100007973 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 112100009985 and 112100010012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112100010221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 359365 + ... + 594426.

Almost surely, 2^112100010021 is an apocalyptic number.

It is an amenable number.

112100010021 is a deficient number, since it is larger than the sum of its proper divisors (55473614043).

112100010021 is an equidigital number, since it uses as much as digits as its factorization.

112100010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 955254 (or 955245 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 112100010021 its reverse (120010001211), we get a palindrome (232110011232).

The spelling of 112100010021 in words is "one hundred twelve billion, one hundred million, ten thousand, twenty-one".