21110202020212 has 12 divisors (see below), whose sum is σ = 38549064558816. Its totient is φ = 10096183574840.

The previous prime is 21110202020183. The next prime is 21110202020221. The reversal of 21110202020212 is 21202020201112.

It is a happy number.

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, 114729358714 + ... + 114729358897.

It is an arithmetic number, because the mean of its divisors is an integer number (3212422046568).

Almost surely, 2^{21110202020212} is an apocalyptic number.

It is an amenable number.

21110202020212 is a deficient number, since it is larger than the sum of its proper divisors (17438862538604).

21110202020212 is a wasteful number, since it uses less digits than its factorization.

21110202020212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229458717638 (or 229458717636 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21110202020212 its reverse (21202020201112), we get a palindrome (42312222221324).

The spelling of 21110202020212 in words is "twenty-one trillion, one hundred ten billion, two hundred two million, twenty thousand, two hundred twelve".