21010101010010 has 64 divisors (see below), whose sum is σ = 44000984899584. Its totient is φ = 7073814240000.

The previous prime is 21010101009973. The next prime is 21010101010051. The reversal of 21010101010010 is 1001010101012.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21010101010010.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1395866 + ... + 6630885.

It is an arithmetic number, because the mean of its divisors is an integer number (687515389056).

Almost surely, 2^{21010101010010} is an apocalyptic number.

21010101010010 is an abundant number, since it is smaller than the sum of its proper divisors (22990883889574).

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

21010101010010 is a wasteful number, since it uses less digits than its factorization.

21010101010010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8027439.

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 21010101010010 its reverse (1001010101012), we get a palindrome (22011111111022).

The spelling of 21010101010010 in words is "twenty-one trillion, ten billion, one hundred one million, ten thousand, ten".