21010202020102 has 8 divisors (see below), whose sum is σ = 31515331138200. Its totient is φ = 10505091640704.

The previous prime is 21010202020039. The next prime is 21010202020111. The reversal of 21010202020102 is 20102020201012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21010202020102² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 1429152 + ... + 6637987.

It is an arithmetic number, because the mean of its divisors is an integer number (3939416392275).

Almost surely, 2^{21010202020102} is an apocalyptic number.

21010202020102 is a deficient number, since it is larger than the sum of its proper divisors (10505129118098).

21010202020102 is a wasteful number, since it uses less digits than its factorization.

21010202020102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9369350.

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

Adding to 21010202020102 its reverse (20102020201012), we get a palindrome (41112222221114).

The spelling of 21010202020102 in words is "twenty-one trillion, ten billion, two hundred two million, twenty thousand, one hundred two".