20121103113021 has 32 divisors (see below), whose sum is σ = 29827494328320. Its totient is φ = 13405766771952.

The previous prime is 20121103112947. The next prime is 20121103113037. The reversal of 20121103113021 is 12031130112102.

20121103113021 is a `hidden beast` number, since 20 + 1 + 21 + 10 + 311 + 302 + 1 = 666.

It is not a de Polignac number, because 20121103113021 - 2⁴³ = 11325010090813 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20121103112985 and 20121103113003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121103103021) 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 in 31 ways as a sum of consecutive naturals, for example, 559476586 + ... + 559512548.

It is an arithmetic number, because the mean of its divisors is an integer number (932109197760).

Almost surely, 2^{20121103113021} is an apocalyptic number.

It is an amenable number.

20121103113021 is a deficient number, since it is larger than the sum of its proper divisors (9706391215299).

20121103113021 is a wasteful number, since it uses less digits than its factorization.

20121103113021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48222 (or 48216 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 20121103113021 its reverse (12031130112102), we get a palindrome (32152233225123).

The spelling of 20121103113021 in words is "twenty trillion, one hundred twenty-one billion, one hundred three million, one hundred thirteen thousand, twenty-one".