12102120211 has 4 divisors (see below), whose sum is σ = 12104734752. Its totient is φ = 12099505672.

The previous prime is 12102120203. The next prime is 12102120221. The reversal of 12102120211 is 11202120121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11202120121 = 53 ⋅211360757.

It is a cyclic number.

It is not a de Polignac number, because 12102120211 - 2³ = 12102120203 is a prime.

It is a super-2 number, since 2×12102120211² (a number of 21 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 = 12102120191 and 12102120200.

It is not an unprimeable number, because it can be changed into a prime (12102120221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1300315 + ... + 1309588.

It is an arithmetic number, because the mean of its divisors is an integer number (3026183688).

Almost surely, 2^12102120211 is an apocalyptic number.

12102120211 is a deficient number, since it is larger than the sum of its proper divisors (2614541).

12102120211 is an equidigital number, since it uses as much as digits as its factorization.

12102120211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2614540.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12102120211 its reverse (11202120121), we get a palindrome (23304240332).

The spelling of 12102120211 in words is "twelve billion, one hundred two million, one hundred twenty thousand, two hundred eleven".