21021200202002 has 256 divisors, whose sum is σ = 45286030540800. Its totient is φ = 7051008476160.

The previous prime is 21021200201909. The next prime is 21021200202017. The reversal of 21021200202002 is 20020200212012.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 582141524 + ... + 582177632.

It is an arithmetic number, because the mean of its divisors is an integer number (176898556800).

Almost surely, 2^{21021200202002} is an apocalyptic number.

21021200202002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21021200202002 is an abundant number, since it is smaller than the sum of its proper divisors (24264830338798).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21021200202002 is a wasteful number, since it uses less digits than its factorization.

21021200202002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36481.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21021200202002 its reverse (20020200212012), we get a palindrome (41041400414014).

The spelling of 21021200202002 in words is "twenty-one trillion, twenty-one billion, two hundred million, two hundred two thousand, two".