12123000312021 has 24 divisors (see below), whose sum is σ = 18541191688344. Its totient is φ = 7606534118400.

The previous prime is 12123000311963. The next prime is 12123000312083. The reversal of 12123000312021 is 12021300032121.

12123000312021 is a `hidden beast` number, since 121 + 230 + 0 + 0 + 312 + 0 + 2 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 7791835800996 + 4331164511025 = 2791386^2 + 2081145^2 .

It is not a de Polignac number, because 12123000312021 - 2⁷ = 12123000311893 is a prime.

It is a super-2 number, since 2×12123000312021² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12123000311985 and 12123000312003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12123000312121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38837671 + ... + 39148571.

It is an arithmetic number, because the mean of its divisors is an integer number (772549653681).

Almost surely, 2^{12123000312021} is an apocalyptic number.

It is an amenable number.

12123000312021 is a deficient number, since it is larger than the sum of its proper divisors (6418191376323).

12123000312021 is a wasteful number, since it uses less digits than its factorization.

12123000312021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565781 (or 565778 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 12123000312021 its reverse (12021300032121), we get a palindrome (24144300344142).

The spelling of 12123000312021 in words is "twelve trillion, one hundred twenty-three billion, three hundred twelve thousand, twenty-one".