12102111220021 has 8 divisors (see below), whose sum is σ = 12197909317280. Its totient is φ = 12006686605392.

The previous prime is 12102111220013. The next prime is 12102111220063. The reversal of 12102111220021 is 12002211120121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12102111220021 - 2³ = 12102111220013 is a prime.

It is a super-2 number, since 2×12102111220021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12102111219977 and 12102111220004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12102111220081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93305595 + ... + 93435208.

It is an arithmetic number, because the mean of its divisors is an integer number (1524738664660).

Almost surely, 2^{12102111220021} is an apocalyptic number.

It is an amenable number.

12102111220021 is a deficient number, since it is larger than the sum of its proper divisors (95798097259).

12102111220021 is a wasteful number, since it uses less digits than its factorization.

12102111220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186741315.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 12102111220021 its reverse (12002211120121), we get a palindrome (24104322340142).

The spelling of 12102111220021 in words is "twelve trillion, one hundred two billion, one hundred eleven million, two hundred twenty thousand, twenty-one".