12352121121021 has 32 divisors (see below), whose sum is σ = 18185023324800. Its totient is φ = 7395505152000.

The previous prime is 12352121120921. The next prime is 12352121121029. The reversal of 12352121121021 is 12012112125321.

It is not a de Polignac number, because 12352121121021 - 2¹⁸ = 12352120858877 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12352121120982 and 12352121121000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12352121121029) 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, 2630440 + ... + 5623473.

It is an arithmetic number, because the mean of its divisors is an integer number (568281978900).

Almost surely, 2^{12352121121021} is an apocalyptic number.

12352121121021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12352121121021 is a deficient number, since it is larger than the sum of its proper divisors (5832902203779).

12352121121021 is a wasteful number, since it uses less digits than its factorization.

12352121121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8254477.

The product of its (nonzero) digits is 480, while the sum is 24.

Adding to 12352121121021 its reverse (12012112125321), we get a palindrome (24364233246342).

The spelling of 12352121121021 in words is "twelve trillion, three hundred fifty-two billion, one hundred twenty-one million, one hundred twenty-one thousand, twenty-one".