20121002221222 has 48 divisors (see below), whose sum is σ = 35464702770432. Its totient is φ = 8385366265920.

The previous prime is 20121002221181. The next prime is 20121002221237. The reversal of 20121002221222 is 22212220012102.

It is a self number, because there is not a number n which added to its sum of digits gives 20121002221222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3397753 + ... + 7196299.

It is an arithmetic number, because the mean of its divisors is an integer number (738847974384).

Almost surely, 2^{20121002221222} is an apocalyptic number.

20121002221222 is a deficient number, since it is larger than the sum of its proper divisors (15343700549210).

20121002221222 is an equidigital number, since it uses as much as digits as its factorization.

20121002221222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3798773 (or 3798700 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 20121002221222 its reverse (22212220012102), we get a palindrome (42333222233324).

The spelling of 20121002221222 in words is "twenty trillion, one hundred twenty-one billion, two million, two hundred twenty-one thousand, two hundred twenty-two".