20100121220002 has 32 divisors (see below), whose sum is σ = 30769608360960. Its totient is φ = 9844797893760.

The previous prime is 20100121219993. The next prime is 20100121220111. The reversal of 20100121220002 is 20002212100102.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 326105727 + ... + 326167357.

It is an arithmetic number, because the mean of its divisors is an integer number (961550261280).

Almost surely, 2^{20100121220002} is an apocalyptic number.

20100121220002 is a deficient number, since it is larger than the sum of its proper divisors (10669487140958).

20100121220002 is a wasteful number, since it uses less digits than its factorization.

20100121220002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71418.

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

Adding to 20100121220002 its reverse (20002212100102), we get a palindrome (40102333320104).

The spelling of 20100121220002 in words is "twenty trillion, one hundred billion, one hundred twenty-one million, two hundred twenty thousand, two".