12110100021 has 16 divisors (see below), whose sum is σ = 17960073600. Its totient is φ = 8064766944.

The previous prime is 12110099983. The next prime is 12110100031. The reversal of 12110100021 is 12000101121.

It is a happy number.

It is not a de Polignac number, because 12110100021 - 2⁷ = 12110099893 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 12110099976 and 12110100012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12110100031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 214041 + ... + 264638.

It is an arithmetic number, because the mean of its divisors is an integer number (1122504600).

Almost surely, 2^12110100021 is an apocalyptic number.

It is an amenable number.

12110100021 is a deficient number, since it is larger than the sum of its proper divisors (5849973579).

12110100021 is an equidigital number, since it uses as much as digits as its factorization.

12110100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479625 (or 479619 counting only the distinct ones).

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

Adding to 12110100021 its reverse (12000101121), we get a palindrome (24110201142).

The spelling of 12110100021 in words is "twelve billion, one hundred ten million, one hundred thousand, twenty-one".