23221021001 has 4 divisors (see below), whose sum is σ = 23567603472. Its totient is φ = 22874438532.

The previous prime is 23221020989. The next prime is 23221021013. The reversal of 23221021001 is 10012012232.

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 an interprime number because it is at equal distance from previous prime (23221020989) and next prime (23221021013).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23221021001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23221021051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 173291135 + ... + 173291268.

It is an arithmetic number, because the mean of its divisors is an integer number (5891900868).

Almost surely, 2^23221021001 is an apocalyptic number.

It is an amenable number.

23221021001 is a deficient number, since it is larger than the sum of its proper divisors (346582471).

23221021001 is an equidigital number, since it uses as much as digits as its factorization.

23221021001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346582470.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 23221021001 its reverse (10012012232), we get a palindrome (33233033233).

The spelling of 23221021001 in words is "twenty-three billion, two hundred twenty-one million, twenty-one thousand, one".