20121202221222 has 16 divisors (see below), whose sum is σ = 40536144622512. Its totient is φ = 6658110710400.

The previous prime is 20121202221217. The next prime is 20121202221233. The reversal of 20121202221222 is 22212220212102.

It is a congruent number.

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, 12239173279 + ... + 12239174922.

It is an arithmetic number, because the mean of its divisors is an integer number (2533509038907).

Almost surely, 2^{20121202221222} is an apocalyptic number.

20121202221222 is an abundant number, since it is smaller than the sum of its proper divisors (20414942401290).

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

20121202221222 is a wasteful number, since it uses less digits than its factorization.

20121202221222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24478348343.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 20121202221222 its reverse (22212220212102), we get a palindrome (42333422433324).

The spelling of 20121202221222 in words is "twenty trillion, one hundred twenty-one billion, two hundred two million, two hundred twenty-one thousand, two hundred twenty-two".