23001220001 has 4 divisors (see below), whose sum is σ = 23024431104. Its totient is φ = 22978008900.

The previous prime is 23001219959. The next prime is 23001220019. The reversal of 23001220001 is 10002210032.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23001220001 is a prime.

It is a super-2 number, since 2×23001220001² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23001220301) 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, 11604065 + ... + 11606046.

It is an arithmetic number, because the mean of its divisors is an integer number (5756107776).

Almost surely, 2^23001220001 is an apocalyptic number.

It is an amenable number.

23001220001 is a deficient number, since it is larger than the sum of its proper divisors (23211103).

23001220001 is an equidigital number, since it uses as much as digits as its factorization.

23001220001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23211102.

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 23001220001 its reverse (10002210032), we get a palindrome (33003430033).

The spelling of 23001220001 in words is "twenty-three billion, one million, two hundred twenty thousand, one".