12121211110 has 32 divisors (see below), whose sum is σ = 22546771200. Its totient is φ = 4686919680.

The previous prime is 12121211057. The next prime is 12121211111. The reversal of 12121211110 is 1111212121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121211111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 266946 + ... + 309034.

It is an arithmetic number, because the mean of its divisors is an integer number (704586600).

Almost surely, 2^12121211110 is an apocalyptic number.

12121211110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12121211110 is a deficient number, since it is larger than the sum of its proper divisors (10425560090).

12121211110 is a wasteful number, since it uses less digits than its factorization.

12121211110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43056.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 12121211110 its reverse (1111212121), we get a palindrome (13232423231).

It can be divided in two parts, 121212111 and 10, that added together give a palindrome (121212121).

The spelling of 12121211110 in words is "twelve billion, one hundred twenty-one million, two hundred eleven thousand, one hundred ten".