12102102012121 has 12 divisors (see below), whose sum is σ = 13360910993136. Its totient is φ = 10953444327320.

The previous prime is 12102102012109. The next prime is 12102102012127. The reversal of 12102102012121 is 12121020120121.

It is not a de Polignac number, because 12102102012121 - 2⁵ = 12102102012089 is a prime.

It is a super-2 number, since 2×12102102012121² (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 = 12102102012095 and 12102102012104.

It is not an unprimeable number, because it can be changed into a prime (12102102012127) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 220275115 + ... + 220330048.

It is an arithmetic number, because the mean of its divisors is an integer number (1113409249428).

Almost surely, 2^{12102102012121} is an apocalyptic number.

12102102012121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12102102012121 is a deficient number, since it is larger than the sum of its proper divisors (1258808981015).

12102102012121 is a wasteful number, since it uses less digits than its factorization.

12102102012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440605412 (or 440605401 counting only the distinct ones).

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

Adding to 12102102012121 its reverse (12121020120121), we get a palindrome (24223122132242).

The spelling of 12102102012121 in words is "twelve trillion, one hundred two billion, one hundred two million, twelve thousand, one hundred twenty-one".