12102121101 has 16 divisors (see below), whose sum is σ = 18463334400. Its totient is φ = 6907245168.

The previous prime is 12102121099. The next prime is 12102121127. The reversal of 12102121101 is 10112120121.

It is not a de Polignac number, because 12102121101 - 2¹ = 12102121099 is a prime.

It is a super-2 number, since 2×12102121101² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12102129101) 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 15 ways as a sum of consecutive naturals, for example, 325821 + ... + 361058.

It is an arithmetic number, because the mean of its divisors is an integer number (1153958400).

Almost surely, 2^12102121101 is an apocalyptic number.

It is an amenable number.

12102121101 is a deficient number, since it is larger than the sum of its proper divisors (6361213299).

12102121101 is an equidigital number, since it uses as much as digits as its factorization.

12102121101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687728.

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

Adding to 12102121101 its reverse (10112120121), we get a palindrome (22214241222).

The spelling of 12102121101 in words is "twelve billion, one hundred two million, one hundred twenty-one thousand, one hundred one".