21120012012130 has 16 divisors (see below), whose sum is σ = 38028877955640. Its totient is φ = 8445147841792.

The previous prime is 21120012012101. The next prime is 21120012012133. The reversal of 21120012012130 is 3121021002112.

It can be written as a sum of positive squares in 4 ways, for example, as 8667801356769 + 12452210655361 = 2944113^2 + 3528769^2 .

It is not an unprimeable number, because it can be changed into a prime (21120012012133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 357089335 + ... + 357148474.

Almost surely, 2^{21120012012130} is an apocalyptic number.

21120012012130 is a deficient number, since it is larger than the sum of its proper divisors (16908865943510).

21120012012130 is a wasteful number, since it uses less digits than its factorization.

21120012012130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714240773.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 21120012012130 its reverse (3121021002112), we get a palindrome (24241033014242).

The spelling of 21120012012130 in words is "twenty-one trillion, one hundred twenty billion, twelve million, twelve thousand, one hundred thirty".