21034020011212 has 24 divisors (see below), whose sum is σ = 39878409213216. Its totient is φ = 9649877440128.

The previous prime is 21034020011183. The next prime is 21034020011297. The reversal of 21034020011212 is 21211002043012.

It is a self number, because there is not a number n which added to its sum of digits gives 21034020011212.

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, 1211070313 + ... + 1211087680.

It is an arithmetic number, because the mean of its divisors is an integer number (1661600383884).

Almost surely, 2^{21034020011212} is an apocalyptic number.

It is an amenable number.

21034020011212 is a deficient number, since it is larger than the sum of its proper divisors (18844389202004).

21034020011212 is a wasteful number, since it uses less digits than its factorization.

21034020011212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2422158177 (or 2422158175 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21034020011212 its reverse (21211002043012), we get a palindrome (42245022054224).

The spelling of 21034020011212 in words is "twenty-one trillion, thirty-four billion, twenty million, eleven thousand, two hundred twelve".