21202010102 has 16 divisors (see below), whose sum is σ = 39142172832. Its totient is φ = 8387608320.

The previous prime is 21202010101. The next prime is 21202010119. The reversal of 21202010102 is 20101020212.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202010101) 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, 58247099 + ... + 58247462.

It is an arithmetic number, because the mean of its divisors is an integer number (2446385802).

Almost surely, 2^21202010102 is an apocalyptic number.

21202010102 is a deficient number, since it is larger than the sum of its proper divisors (17940162730).

21202010102 is a wasteful number, since it uses less digits than its factorization.

21202010102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116494583.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21202010102 its reverse (20101020212), we get a palindrome (41303030314).

The spelling of 21202010102 in words is "twenty-one billion, two hundred two million, ten thousand, one hundred two".