21010201010102 has 8 divisors (see below), whose sum is σ = 31809837043656. Its totient is φ = 10406921995552.

The previous prime is 21010201010047. The next prime is 21010201010147. The reversal of 21010201010102 is 20101010201012.

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

It is a super-2 number, since 2×21010201010102² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49089254483 + ... + 49089254910.

It is an arithmetic number, because the mean of its divisors is an integer number (3976229630457).

Almost surely, 2^{21010201010102} is an apocalyptic number.

21010201010102 is a deficient number, since it is larger than the sum of its proper divisors (10799636033554).

21010201010102 is a wasteful number, since it uses less digits than its factorization.

21010201010102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98178509502.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21010201010102 its reverse (20101010201012), we get a palindrome (41111211211114).

The spelling of 21010201010102 in words is "twenty-one trillion, ten billion, two hundred one million, ten thousand, one hundred two".