21020210021002 has 8 divisors (see below), whose sum is σ = 31530339749700. Its totient is φ = 10510096771104.

The previous prime is 21020210020993. The next prime is 21020210021017. The reversal of 21020210021002 is 20012001202012.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20749018001881 + 271192019121 = 4555109^2 + 520761^2 .

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 (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175477 + ... + 6486232.

Almost surely, 2^{21020210021002} is an apocalyptic number.

21020210021002 is a deficient number, since it is larger than the sum of its proper divisors (10510129728698).

21020210021002 is a wasteful number, since it uses less digits than its factorization.

21020210021002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8239400.

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

Adding to 21020210021002 its reverse (20012001202012), we get a palindrome (41032211223014).

The spelling of 21020210021002 in words is "twenty-one trillion, twenty billion, two hundred ten million, twenty-one thousand, two".