12102122121221 has 8 divisors (see below), whose sum is σ = 13426083093600. Its totient is φ = 10815455824240.

The previous prime is 12102122121217. The next prime is 12102122121223. The reversal of 12102122121221 is 12212122120121.

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 12102122121221 - 2² = 12102122121217 is a prime.

It is a super-2 number, since 2×12102122121221² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12102122121193 and 12102122121202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12102122121223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9323668166 + ... + 9323669463.

It is an arithmetic number, because the mean of its divisors is an integer number (1678260386700).

Almost surely, 2^{12102122121221} is an apocalyptic number.

12102122121221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12102122121221 is a deficient number, since it is larger than the sum of its proper divisors (1323960972379).

12102122121221 is a wasteful number, since it uses less digits than its factorization.

12102122121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18647337699.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 12102122121221 its reverse (12212122120121), we get a palindrome (24314244241342).

The spelling of 12102122121221 in words is "twelve trillion, one hundred two billion, one hundred twenty-two million, one hundred twenty-one thousand, two hundred twenty-one".