2121002120202 has 64 divisors (see below), whose sum is σ = 4930553548800. Its totient is φ = 595683599040.

The previous prime is 2121002120173. The next prime is 2121002120213. The reversal of 2121002120202 is 2020212001212.

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 31 ways as a sum of consecutive naturals, for example, 44181052 + ... + 44229032.

It is an arithmetic number, because the mean of its divisors is an integer number (77039899200).

Almost surely, 2^{2121002120202} is an apocalyptic number.

2121002120202 is an abundant number, since it is smaller than the sum of its proper divisors (2809551428598).

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

2121002120202 is a wasteful number, since it uses less digits than its factorization.

2121002120202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65891.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 2121002120202 its reverse (2020212001212), we get a palindrome (4141214121414).

The spelling of 2121002120202 in words is "two trillion, one hundred twenty-one billion, two million, one hundred twenty thousand, two hundred two".