21010202110 has 16 divisors (see below), whose sum is σ = 37820138400. Its totient is φ = 8403686496.

The previous prime is 21010202107. The next prime is 21010202111. The reversal of 21010202110 is 1120201012.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010202111) 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, 277876 + ... + 345304.

It is an arithmetic number, because the mean of its divisors is an integer number (2363758650).

Almost surely, 2^21010202110 is an apocalyptic number.

21010202110 is a deficient number, since it is larger than the sum of its proper divisors (16809936290).

21010202110 is a wasteful number, since it uses less digits than its factorization.

21010202110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98595.

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

Adding to 21010202110 its reverse (1120201012), we get a palindrome (22130403122).

The spelling of 21010202110 in words is "twenty-one billion, ten million, two hundred two thousand, one hundred ten".