21211121202002 has 8 divisors (see below), whose sum is σ = 31816701391356. Its totient is φ = 10605554071552.

The previous prime is 21211121201999. The next prime is 21211121202041. The reversal of 21211121202002 is 20020212111212.

It can be written as a sum of positive squares in 2 ways, for example, as 21185482467361 + 25638734641 = 4602769^2 + 160121^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4322258 + ... + 7816914.

Almost surely, 2^{21211121202002} is an apocalyptic number.

21211121202002 is a deficient number, since it is larger than the sum of its proper divisors (10605580189354).

21211121202002 is a wasteful number, since it uses less digits than its factorization.

21211121202002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6529452.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21211121202002 its reverse (20020212111212), we get a palindrome (41231333313214).

The spelling of 21211121202002 in words is "twenty-one trillion, two hundred eleven billion, one hundred twenty-one million, two hundred two thousand, two".