21201102212002 has 8 divisors (see below), whose sum is σ = 31803722033436. Its totient is φ = 10599861534192.

The previous prime is 21201102211999. The next prime is 21201102212041. The reversal of 21201102212002 is 20021220110212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 21180971993841 + 20130218161 = 4602279^2 + 141881^2 .

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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 344747473 + ... + 344808964.

Almost surely, 2^{21201102212002} is an apocalyptic number.

21201102212002 is a deficient number, since it is larger than the sum of its proper divisors (10602619821434).

21201102212002 is a wasteful number, since it uses less digits than its factorization.

21201102212002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689571812.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21201102212002 its reverse (20021220110212), we get a palindrome (41222322322214).

The spelling of 21201102212002 in words is "twenty-one trillion, two hundred one billion, one hundred two million, two hundred twelve thousand, two".