12121121222110 has 32 divisors (see below), whose sum is σ = 21905807422464. Its totient is φ = 4828941300000.

The previous prime is 12121121222071. The next prime is 12121121222137. The reversal of 12121121222110 is 1122212112121.

It is a happy number.

It is a congruent 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, 75397915 + ... + 75558505.

It is an arithmetic number, because the mean of its divisors is an integer number (684556481952).

Almost surely, 2^{12121121222110} is an apocalyptic number.

12121121222110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12121121222110 is a deficient number, since it is larger than the sum of its proper divisors (9784686200354).

12121121222110 is a wasteful number, since it uses less digits than its factorization.

12121121222110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190920.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 12121121222110 its reverse (1122212112121), we get a palindrome (13243333334231).

The spelling of 12121121222110 in words is "twelve trillion, one hundred twenty-one billion, one hundred twenty-one million, two hundred twenty-two thousand, one hundred ten".