12121121210 has 128 divisors (see below), whose sum is σ = 27148566528. Its totient is φ = 3839616000.

The previous prime is 12121121209. The next prime is 12121121273. The reversal of 12121121210 is 1212112121.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1328765 + ... + 1337855.

It is an arithmetic number, because the mean of its divisors is an integer number (212098176).

Almost surely, 2^12121121210 is an apocalyptic number.

12121121210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12121121210 is an abundant number, since it is smaller than the sum of its proper divisors (15027445318).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12121121210 is a wasteful number, since it uses less digits than its factorization.

12121121210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9180.

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

Adding to 12121121210 its reverse (1212112121), we get a palindrome (13333233331).

It can be divided in two parts, 12121 and 121210, that added together give a palindrome (133331).

The spelling of 12121121210 in words is "twelve billion, one hundred twenty-one million, one hundred twenty-one thousand, two hundred ten".