21121002001202 has 8 divisors (see below), whose sum is σ = 31689382024812. Its totient is φ = 10557874659600.

The previous prime is 21121002001153. The next prime is 21121002001243. The reversal of 21121002001202 is 20210020012112.

It can be written as a sum of positive squares in 2 ways, for example, as 20453919805201 + 667082196001 = 4522601^2 + 816751^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 1313160449 + ... + 1313176532.

Almost surely, 2^{21121002001202} is an apocalyptic number.

21121002001202 is a deficient number, since it is larger than the sum of its proper divisors (10568380023610).

21121002001202 is a wasteful number, since it uses less digits than its factorization.

21121002001202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2626341004.

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

Adding to 21121002001202 its reverse (20210020012112), we get a palindrome (41331022013314).

The spelling of 21121002001202 in words is "twenty-one trillion, one hundred twenty-one billion, two million, one thousand, two hundred two".