23121122642 has 4 divisors (see below), whose sum is σ = 34681683966. Its totient is φ = 11560561320.

The previous prime is 23121122627. The next prime is 23121122653. The reversal of 23121122642 is 24622112132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 15224845321 + 7896277321 = 123389^2 + 88861^2 .

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 as a sum of consecutive naturals, namely, 5780280659 + ... + 5780280662.

Almost surely, 2^23121122642 is an apocalyptic number.

23121122642 is a deficient number, since it is larger than the sum of its proper divisors (11560561324).

23121122642 is a wasteful number, since it uses less digits than its factorization.

23121122642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11560561323.

The product of its digits is 2304, while the sum is 26.

Adding to 23121122642 its reverse (24622112132), we get a palindrome (47743234774).

The spelling of 23121122642 in words is "twenty-three billion, one hundred twenty-one million, one hundred twenty-two thousand, six hundred forty-two".