2121100120202 has 64 divisors (see below), whose sum is σ = 3864768318720. Its totient is φ = 852307577856.

The previous prime is 2121100120187. The next prime is 2121100120207. The reversal of 2121100120202 is 2020210011212.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is not an unprimeable number, because it can be changed into a prime (2121100120207) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 79093748 + ... + 79120560.

It is an arithmetic number, because the mean of its divisors is an integer number (60387004980).

Almost surely, 2^{2121100120202} is an apocalyptic number.

2121100120202 is a deficient number, since it is larger than the sum of its proper divisors (1743668198518).

2121100120202 is a wasteful number, since it uses less digits than its factorization.

2121100120202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28095.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2121100120202 its reverse (2020210011212), we get a palindrome (4141310131414).

The spelling of 2121100120202 in words is "two trillion, one hundred twenty-one billion, one hundred million, one hundred twenty thousand, two hundred two".