21002020212010 has 16 divisors (see below), whose sum is σ = 38075604991200. Its totient is φ = 8340370616016.

The previous prime is 21002020212007. The next prime is 21002020212071. The reversal of 21002020212010 is 1021202020012.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7554682140 + ... + 7554684919.

It is an arithmetic number, because the mean of its divisors is an integer number (2379725311950).

Almost surely, 2^{21002020212010} is an apocalyptic number.

21002020212010 is a deficient number, since it is larger than the sum of its proper divisors (17073584779190).

21002020212010 is a wasteful number, since it uses less digits than its factorization.

21002020212010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15109367205.

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

Adding to 21002020212010 its reverse (1021202020012), we get a palindrome (22023222232022).

The spelling of 21002020212010 in words is "twenty-one trillion, two billion, twenty million, two hundred twelve thousand, ten".