21210102010202 has 96 divisors (see below), whose sum is σ = 39063374597520. Its totient is φ = 8600101171200.

The previous prime is 21210102010183. The next prime is 21210102010211. The reversal of 21210102010202 is 20201020101212.

It can be written as a sum of positive squares in 8 ways, for example, as 16053156076321 + 5156945933881 = 4006639^2 + 2270891^2 .

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 47 ways as a sum of consecutive naturals, for example, 27462188 + ... + 28223960.

Almost surely, 2^{21210102010202} is an apocalyptic number.

21210102010202 is a deficient number, since it is larger than the sum of its proper divisors (17853272587318).

21210102010202 is a wasteful number, since it uses less digits than its factorization.

21210102010202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762016 (or 762009 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21210102010202 its reverse (20201020101212), we get a palindrome (41411122111414).

The spelling of 21210102010202 in words is "twenty-one trillion, two hundred ten billion, one hundred two million, ten thousand, two hundred two".