21011002002212 has 12 divisors (see below), whose sum is σ = 36886727159436. Its totient is φ = 10471937099520.

The previous prime is 21011002002161. The next prime is 21011002002239. The reversal of 21011002002212 is 21220020011012.

It can be written as a sum of positive squares in 2 ways, for example, as 5045351546596 + 15965650455616 = 2246186^2 + 3995704^2 .

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, 8390973989 + ... + 8390976492.

It is an arithmetic number, because the mean of its divisors is an integer number (3073893929953).

Almost surely, 2^{21011002002212} is an apocalyptic number.

It is an amenable number.

21011002002212 is a deficient number, since it is larger than the sum of its proper divisors (15875725157224).

21011002002212 is a wasteful number, since it uses less digits than its factorization.

21011002002212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16781950798 (or 16781950796 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21011002002212 its reverse (21220020011012), we get a palindrome (42231022013224).

The spelling of 21011002002212 in words is "twenty-one trillion, eleven billion, two million, two thousand, two hundred twelve".