12111121210 has 32 divisors (see below), whose sum is σ = 22568896512. Its totient is φ = 4676411520.

The previous prime is 12111121207. The next prime is 12111121223. The reversal of 12111121210 is 1212111121.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142186 + ... + 210805.

It is an arithmetic number, because the mean of its divisors is an integer number (705278016).

Almost surely, 2^12111121210 is an apocalyptic number.

12111121210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12111121210 is a deficient number, since it is larger than the sum of its proper divisors (10457775302).

12111121210 is a wasteful number, since it uses less digits than its factorization.

12111121210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353118.

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

Adding to 12111121210 its reverse (1212111121), we get a palindrome (13323232331).

The spelling of 12111121210 in words is "twelve billion, one hundred eleven million, one hundred twenty-one thousand, two hundred ten".