21133320111012 has 12 divisors (see below), whose sum is σ = 49311080259056. Its totient is φ = 7044440037000.

The previous prime is 21133320110963. The next prime is 21133320111019. The reversal of 21133320111012 is 21011102333112.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 21133320111012.

It is not an unprimeable number, because it can be changed into a prime (21133320111019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 880555004614 + ... + 880555004637.

Almost surely, 2^{21133320111012} is an apocalyptic number.

It is an amenable number.

21133320111012 is an abundant number, since it is smaller than the sum of its proper divisors (28177760148044).

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

21133320111012 is a wasteful number, since it uses less digits than its factorization.

21133320111012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1761110009258 (or 1761110009256 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 21133320111012 its reverse (21011102333112), we get a palindrome (42144422444124).

The spelling of 21133320111012 in words is "twenty-one trillion, one hundred thirty-three billion, three hundred twenty million, one hundred eleven thousand, twelve".