21010210012 has 24 divisors (see below), whose sum is σ = 40119578352. Its totient is φ = 9547910400.

The previous prime is 21010210009. The next prime is 21010210031. The reversal of 21010210012 is 21001201012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148338 + ... + 253030.

It is an arithmetic number, because the mean of its divisors is an integer number (1671649098).

Almost surely, 2^21010210012 is an apocalyptic number.

21010210012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21010210012 is a deficient number, since it is larger than the sum of its proper divisors (19109368340).

21010210012 is a wasteful number, since it uses less digits than its factorization.

21010210012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109269 (or 109267 counting only the distinct ones).

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

Adding to 21010210012 its reverse (21001201012), we get a palindrome (42011411024).

The spelling of 21010210012 in words is "twenty-one billion, ten million, two hundred ten thousand, twelve".