21020200211002 has 32 divisors (see below), whose sum is σ = 32080132521360. Its totient is φ = 10327181114880.

The previous prime is 21020200210993. The next prime is 21020200211033. The reversal of 21020200211002 is 20011200202012.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 5866612007881 + 15153588203121 = 2422109^2 + 3892761^2 .

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 15 ways as a sum of consecutive naturals, for example, 722900488 + ... + 722929564.

Almost surely, 2^{21020200211002} is an apocalyptic number.

21020200211002 is a deficient number, since it is larger than the sum of its proper divisors (11059932310358).

21020200211002 is a wasteful number, since it uses less digits than its factorization.

21020200211002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35026.

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

Adding to 21020200211002 its reverse (20011200202012), we get a palindrome (41031400413014).

The spelling of 21020200211002 in words is "twenty-one trillion, twenty billion, two hundred million, two hundred eleven thousand, two".