21212011002002 has 4 divisors (see below), whose sum is σ = 31818016503006. Its totient is φ = 10606005501000.

The previous prime is 21212011002001. The next prime is 21212011002109. The reversal of 21212011002002 is 20020011021212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 17125948999201 + 4086062002801 = 4138351^2 + 2021401^2 .

It is not an unprimeable number, because it can be changed into a prime (21212011002001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5303002750499 + ... + 5303002750502.

Almost surely, 2^{21212011002002} is an apocalyptic number.

21212011002002 is a deficient number, since it is larger than the sum of its proper divisors (10606005501004).

21212011002002 is a wasteful number, since it uses less digits than its factorization.

21212011002002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10606005501003.

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

Adding to 21212011002002 its reverse (20020011021212), we get a palindrome (41232022023214).

The spelling of 21212011002002 in words is "twenty-one trillion, two hundred twelve billion, eleven million, two thousand, two".