21012002021010 has 128 divisors (see below), whose sum is σ = 67708605210624. Its totient is φ = 4030274108160.

The previous prime is 21012002020991. The next prime is 21012002021063. The reversal of 21012002021010 is 1012020021012.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 349820154 + ... + 349880213.

It is an arithmetic number, because the mean of its divisors is an integer number (528973478208).

Almost surely, 2^{21012002021010} is an apocalyptic number.

21012002021010 is an abundant number, since it is smaller than the sum of its proper divisors (46696603189614).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21012002021010 is a wasteful number, since it uses less digits than its factorization.

21012002021010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 699700408.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21012002021010 its reverse (1012020021012), we get a palindrome (22024022042022).

The spelling of 21012002021010 in words is "twenty-one trillion, twelve billion, two million, twenty-one thousand, ten".