21121120012023 has 32 divisors (see below), whose sum is σ = 31301384774400. Its totient is φ = 14075871249888.

The previous prime is 21121120012021. The next prime is 21121120012061. The reversal of 21121120012023 is 32021002112112.

21121120012023 is a `hidden beast` number, since 211 + 211 + 200 + 1 + 20 + 23 = 666.

It is not a de Polignac number, because 21121120012023 - 2¹ = 21121120012021 is a prime.

It is a super-2 number, since 2×21121120012023² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21121120011987 and 21121120012005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21121120012021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1779813736 + ... + 1779825602.

It is an arithmetic number, because the mean of its divisors is an integer number (978168274200).

Almost surely, 2^{21121120012023} is an apocalyptic number.

21121120012023 is a deficient number, since it is larger than the sum of its proper divisors (10180264762377).

21121120012023 is a wasteful number, since it uses less digits than its factorization.

21121120012023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29148 (or 29142 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 21121120012023 its reverse (32021002112112), we get a palindrome (53142122124135).

The spelling of 21121120012023 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred twenty million, twelve thousand, twenty-three".