12102101010021 has 16 divisors (see below), whose sum is σ = 17603671016448. Its totient is φ = 7334350422000.

The previous prime is 12102101009993. The next prime is 12102101010037. The reversal of 12102101010021 is 12001010120121.

12102101010021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12102101010021 - 2⁷ = 12102101009893 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12102101009979 and 12102101010006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12102101010821) 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, 5445255 + ... + 7338596.

It is an arithmetic number, because the mean of its divisors is an integer number (1100229438528).

Almost surely, 2^{12102101010021} is an apocalyptic number.

12102101010021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12102101010021 is a deficient number, since it is larger than the sum of its proper divisors (5501570006427).

12102101010021 is a wasteful number, since it uses less digits than its factorization.

12102101010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12812552.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 12102101010021 its reverse (12001010120121), we get a palindrome (24103111130142).

The spelling of 12102101010021 in words is "twelve trillion, one hundred two billion, one hundred one million, ten thousand, twenty-one".