21021101120212 has 12 divisors (see below), whose sum is σ = 36787010943060. Its totient is φ = 10510526565056.

The previous prime is 21021101120183. The next prime is 21021101120263. The reversal of 21021101120212 is 21202110112012.

It can be written as a sum of positive squares in 2 ways, for example, as 5869591580176 + 15151509540036 = 2422724^2 + 3892494^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3949873 + ... + 7592344.

It is an arithmetic number, because the mean of its divisors is an integer number (3065584245255).

Almost surely, 2^{21021101120212} is an apocalyptic number.

It is an amenable number.

21021101120212 is a deficient number, since it is larger than the sum of its proper divisors (15765909822848).

21021101120212 is a wasteful number, since it uses less digits than its factorization.

21021101120212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11997530 (or 11997528 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21021101120212 its reverse (21202110112012), we get a palindrome (42223211232224).

The spelling of 21021101120212 in words is "twenty-one trillion, twenty-one billion, one hundred one million, one hundred twenty thousand, two hundred twelve".