21002002211002 has 8 divisors (see below), whose sum is σ = 31503085096212. Its totient is φ = 10500973845600.

The previous prime is 21002002210991. The next prime is 21002002211009. The reversal of 21002002211002 is 20011220020012.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19872881325801 + 1129120885201 = 4457901^2 + 1062601^2 .

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

It is not an unprimeable number, because it can be changed into a prime (21002002211009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12652899 + ... + 14216182.

Almost surely, 2^{21002002211002} is an apocalyptic number.

21002002211002 is a deficient number, since it is larger than the sum of its proper divisors (10501082885210).

21002002211002 is a wasteful number, since it uses less digits than its factorization.

21002002211002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27259904.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21002002211002 its reverse (20011220020012), we get a palindrome (41013222231014).

The spelling of 21002002211002 in words is "twenty-one trillion, two billion, two million, two hundred eleven thousand, two".