12121222112210 has 16 divisors (see below), whose sum is σ = 22522012699392. Its totient is φ = 4692085978800.

The previous prime is 12121222112113. The next prime is 12121222112227. The reversal of 12121222112210 is 1221122212121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19550357936 + ... + 19550358555.

It is an arithmetic number, because the mean of its divisors is an integer number (1407625793712).

Almost surely, 2^{12121222112210} is an apocalyptic number.

12121222112210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12121222112210 is a deficient number, since it is larger than the sum of its proper divisors (10400790587182).

12121222112210 is a wasteful number, since it uses less digits than its factorization.

12121222112210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39100716529.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 12121222112210 its reverse (1221122212121), we get a palindrome (13342344324331).

The spelling of 12121222112210 in words is "twelve trillion, one hundred twenty-one billion, two hundred twenty-two million, one hundred twelve thousand, two hundred ten".