21020110120012 has 12 divisors (see below), whose sum is σ = 36817152051456. Its totient is φ = 10500923819600.

The previous prime is 21020110119973. The next prime is 21020110120027. The reversal of 21020110120012 is 21002101102012.

It is a junction number, because it is equal to n+sod(n) for n = 21020110119974 and 21020110120001.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2282804923 + ... + 2282814130.

It is an arithmetic number, because the mean of its divisors is an integer number (3068096004288).

Almost surely, 2^{21020110120012} is an apocalyptic number.

It is an amenable number.

21020110120012 is a deficient number, since it is larger than the sum of its proper divisors (15797041931444).

21020110120012 is a wasteful number, since it uses less digits than its factorization.

21020110120012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4565620208 (or 4565620206 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21020110120012 its reverse (21002101102012), we get a palindrome (42022211222024).

The spelling of 21020110120012 in words is "twenty-one trillion, twenty billion, one hundred ten million, one hundred twenty thousand, twelve".