21001100010202 has 16 divisors (see below), whose sum is σ = 33939247196232. Its totient is φ = 9688703008320.

The previous prime is 21001100010197. The next prime is 21001100010203. The reversal of 21001100010202 is 20201000110012.

It can be written as a sum of positive squares in 4 ways, for example, as 9376266560761 + 11624833449441 = 3062069^2 + 3409521^2 .

It is not an unprimeable number, because it can be changed into a prime (21001100010203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171286749 + ... + 171409312.

Almost surely, 2^{21001100010202} is an apocalyptic number.

21001100010202 is a deficient number, since it is larger than the sum of its proper divisors (12938147186030).

21001100010202 is a wasteful number, since it uses less digits than its factorization.

21001100010202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342698433.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21001100010202 its reverse (20201000110012), we get a palindrome (41202100120214).

The spelling of 21001100010202 in words is "twenty-one trillion, one billion, one hundred million, ten thousand, two hundred two".