12102321011 has 4 divisors (see below), whose sum is σ = 13202532024. Its totient is φ = 11002110000.

The previous prime is 12102320969. The next prime is 12102321013. The reversal of 12102321011 is 11012320121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12102321011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12102321013) 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, 550105490 + ... + 550105511.

It is an arithmetic number, because the mean of its divisors is an integer number (3300633006).

Almost surely, 2^12102321011 is an apocalyptic number.

12102321011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12102321011 is a deficient number, since it is larger than the sum of its proper divisors (1100211013).

12102321011 is a wasteful number, since it uses less digits than its factorization.

12102321011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100211012.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 12102321011 its reverse (11012320121), we get a palindrome (23114641132).

The spelling of 12102321011 in words is "twelve billion, one hundred two million, three hundred twenty-one thousand, eleven".