12101110021 has 48 divisors (see below), whose sum is σ = 16578354240. Its totient is φ = 8682750720.

The previous prime is 12101110003. The next prime is 12101110039. The reversal of 12101110021 is 12001110121.

It is an interprime number because it is at equal distance from previous prime (12101110003) and next prime (12101110039).

It is not a de Polignac number, because 12101110021 - 2⁵ = 12101109989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12101110921) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3200310 + ... + 3204088.

It is an arithmetic number, because the mean of its divisors is an integer number (345382380).

Almost surely, 2^12101110021 is an apocalyptic number.

12101110021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12101110021 is a deficient number, since it is larger than the sum of its proper divisors (4477244219).

12101110021 is a wasteful number, since it uses less digits than its factorization.

12101110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4274 (or 4267 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 12101110021 its reverse (12001110121), we get a palindrome (24102220142).

The spelling of 12101110021 in words is "twelve billion, one hundred one million, one hundred ten thousand, twenty-one".