21133030025512 has 8 divisors (see below), whose sum is σ = 39624431297850. Its totient is φ = 10566515012752.

The previous prime is 21133030025483. The next prime is 21133030025519. The reversal of 21133030025512 is 21552003033112.

It can be written as a sum of positive squares in only one way, i.e., 10712568276036 + 10420461749476 = 3273006^2 + 3228074^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (21133030025519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1320814376587 + ... + 1320814376602.

Almost surely, 2^{21133030025512} is an apocalyptic number.

It is an amenable number.

21133030025512 is a deficient number, since it is larger than the sum of its proper divisors (18491401272338).

21133030025512 is a wasteful number, since it uses less digits than its factorization.

21133030025512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2641628753195 (or 2641628753191 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 28.

Adding to 21133030025512 its reverse (21552003033112), we get a palindrome (42685033058624).

The spelling of 21133030025512 in words is "twenty-one trillion, one hundred thirty-three billion, thirty million, twenty-five thousand, five hundred twelve".