10023221987 has 4 divisors (see below), whose sum is σ = 10029555360. Its totient is φ = 10016888616.

The previous prime is 10023221969. The next prime is 10023222007. The reversal of 10023221987 is 78912232001.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10023221987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10023221287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3164312 + ... + 3167477.

It is an arithmetic number, because the mean of its divisors is an integer number (2507388840).

Almost surely, 2^10023221987 is an apocalyptic number.

10023221987 is a deficient number, since it is larger than the sum of its proper divisors (6333373).

10023221987 is an equidigital number, since it uses as much as digits as its factorization.

10023221987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6333372.

The product of its (nonzero) digits is 12096, while the sum is 35.

Adding to 10023221987 its reverse (78912232001), we get a palindrome (88935453988).

The spelling of 10023221987 in words is "ten billion, twenty-three million, two hundred twenty-one thousand, nine hundred eighty-seven".