21001121201202 has 64 divisors (see below), whose sum is σ = 43996780969344. Its totient is φ = 6676580252160.

The previous prime is 21001121201183. The next prime is 21001121201209. The reversal of 21001121201202 is 20210212110012.

It is a super-2 number, since 2×21001121201202² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21001121201209) 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, 704013 + ... + 6519039.

It is an arithmetic number, because the mean of its divisors is an integer number (687449702646).

Almost surely, 2^{21001121201202} is an apocalyptic number.

21001121201202 is an abundant number, since it is smaller than the sum of its proper divisors (22995659768142).

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

21001121201202 is a wasteful number, since it uses less digits than its factorization.

21001121201202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5815403.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21001121201202 its reverse (20210212110012), we get a palindrome (41211333311214).

The spelling of 21001121201202 in words is "twenty-one trillion, one billion, one hundred twenty-one million, two hundred one thousand, two hundred two".