12312020123021 has 4 divisors (see below), whose sum is σ = 12321440185632. Its totient is φ = 12302600060412.

The previous prime is 12312020122943. The next prime is 12312020123087. The reversal of 12312020123021 is 12032102021321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12312020123021 - 2¹⁰ = 12312020121997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12312020122984 and 12312020123002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12312020123321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4710029345 + ... + 4710031958.

It is an arithmetic number, because the mean of its divisors is an integer number (3080360046408).

Almost surely, 2^{12312020123021} is an apocalyptic number.

It is an amenable number.

12312020123021 is a deficient number, since it is larger than the sum of its proper divisors (9420062611).

12312020123021 is an equidigital number, since it uses as much as digits as its factorization.

12312020123021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9420062610.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 12312020123021 its reverse (12032102021321), we get a palindrome (24344122144342).

The spelling of 12312020123021 in words is "twelve trillion, three hundred twelve billion, twenty million, one hundred twenty-three thousand, twenty-one".