21000212212112 has 40 divisors (see below), whose sum is σ = 46685730796992. Its totient is φ = 8964234000000.

The previous prime is 21000212212103. The next prime is 21000212212151. The reversal of 21000212212112 is 21121221200012.

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, 373481639 + ... + 373537862.

Almost surely, 2^{21000212212112} is an apocalyptic number.

It is an amenable number.

21000212212112 is an abundant number, since it is smaller than the sum of its proper divisors (25685518584880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21000212212112 is a wasteful number, since it uses less digits than its factorization.

21000212212112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 747019767 (or 747019761 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21000212212112 its reverse (21121221200012), we get a palindrome (42121433412124).

The spelling of 21000212212112 in words is "twenty-one trillion, two hundred twelve million, two hundred twelve thousand, one hundred twelve".