12221122121210 has 16 divisors (see below), whose sum is σ = 22245188581800. Its totient is φ = 4833522456576.

The previous prime is 12221122121203. The next prime is 12221122121297. The reversal of 12221122121210 is 1212122112221.

It can be written as a sum of positive squares in 4 ways, for example, as 5214285477361 + 7006836643849 = 2283481^2 + 2647043^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6865798055 + ... + 6865799834.

Almost surely, 2^{12221122121210} is an apocalyptic number.

12221122121210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12221122121210 is a deficient number, since it is larger than the sum of its proper divisors (10024066460590).

12221122121210 is a wasteful number, since it uses less digits than its factorization.

12221122121210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13731597985.

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

Adding to 12221122121210 its reverse (1212122112221), we get a palindrome (13433244233431).

The spelling of 12221122121210 in words is "twelve trillion, two hundred twenty-one billion, one hundred twenty-two million, one hundred twenty-one thousand, two hundred ten".