12102121211 has 8 divisors (see below), whose sum is σ = 12914910720. Its totient is φ = 11300542848.

The previous prime is 12102121189. The next prime is 12102121253. The reversal of 12102121211 is 11212120121.

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 12102121211 - 2⁶ = 12102121147 is a prime.

It is a super-2 number, since 2×12102121211² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12102121261) 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, 2800556 + ... + 2804873.

It is an arithmetic number, because the mean of its divisors is an integer number (1614363840).

Almost surely, 2^12102121211 is an apocalyptic number.

12102121211 is a deficient number, since it is larger than the sum of its proper divisors (812789509).

12102121211 is a wasteful number, since it uses less digits than its factorization.

12102121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5605573.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 12102121211 its reverse (11212120121), we get a palindrome (23314241332).

The spelling of 12102121211 in words is "twelve billion, one hundred two million, one hundred twenty-one thousand, two hundred eleven".