12342531021 has 8 divisors (see below), whose sum is σ = 16806850944. Its totient is φ = 8053282560.

The previous prime is 12342531017. The next prime is 12342531023. The reversal of 12342531021 is 12013524321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12342531021 - 2² = 12342531017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12342530982 and 12342531000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12342531023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43767700 + ... + 43767981.

It is an arithmetic number, because the mean of its divisors is an integer number (2100856368).

Almost surely, 2^12342531021 is an apocalyptic number.

It is an amenable number.

12342531021 is a deficient number, since it is larger than the sum of its proper divisors (4464319923).

12342531021 is an equidigital number, since it uses as much as digits as its factorization.

12342531021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87535731.

The product of its (nonzero) digits is 1440, while the sum is 24.

The spelling of 12342531021 in words is "twelve billion, three hundred forty-two million, five hundred thirty-one thousand, twenty-one".