23121567842 has 8 divisors (see below), whose sum is σ = 36722490156. Its totient is φ = 10880737792.

The previous prime is 23121567773. The next prime is 23121567851. The reversal of 23121567842 is 24876512132.

It can be written as a sum of positive squares in 2 ways, for example, as 22810362961 + 311204881 = 151031^2 + 17641^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 23121567842.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 340023023 + ... + 340023090.

Almost surely, 2^23121567842 is an apocalyptic number.

23121567842 is a deficient number, since it is larger than the sum of its proper divisors (13600922314).

23121567842 is a wasteful number, since it uses less digits than its factorization.

23121567842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680046132.

The product of its digits is 161280, while the sum is 41.

The spelling of 23121567842 in words is "twenty-three billion, one hundred twenty-one million, five hundred sixty-seven thousand, eight hundred forty-two".