21000011002112 has 18 divisors (see below), whose sum is σ = 41917990711758. Its totient is φ = 10500005500928.

The previous prime is 21000011002057. The next prime is 21000011002123. The reversal of 21000011002112 is 21120011000012.

It can be written as a sum of positive squares in only one way, i.e., 15628296253696 + 5371714748416 = 3953264^2 + 2317696^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21000011002093 and 21000011002102.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41015646233 + ... + 41015646744.

Almost surely, 2^{21000011002112} is an apocalyptic number.

It is an amenable number.

21000011002112 is a deficient number, since it is larger than the sum of its proper divisors (20917979709646).

21000011002112 is an frugal number, since it uses more digits than its factorization.

21000011002112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82031292993 (or 82031292979 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21000011002112 its reverse (21120011000012), we get a palindrome (42120022002124).

The spelling of 21000011002112 in words is "twenty-one trillion, eleven million, two thousand, one hundred twelve".