20121220010002 has 16 divisors (see below), whose sum is σ = 30208050585720. Its totient is φ = 10051873431552.

The previous prime is 20121220009997. The next prime is 20121220010009. The reversal of 20121220010002 is 20001002212102.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 16557729436161 + 3563490573841 = 4069119^2 + 1887721^2 .

It is not an unprimeable number, because it can be changed into a prime (20121220010009) by changing a digit.

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, 10254658 + ... + 12058210.

Almost surely, 2^{20121220010002} is an apocalyptic number.

20121220010002 is a deficient number, since it is larger than the sum of its proper divisors (10086830575718).

20121220010002 is a wasteful number, since it uses less digits than its factorization.

20121220010002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1808397.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20121220010002 its reverse (20001002212102), we get a palindrome (40122222222104).

The spelling of 20121220010002 in words is "twenty trillion, one hundred twenty-one billion, two hundred twenty million, ten thousand, two".