23220021001 has 4 divisors (see below), whose sum is σ = 23250060612. Its totient is φ = 23189981392.

The previous prime is 23220020977. The next prime is 23220021007. The reversal of 23220021001 is 10012002232.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1274561401 + 21945459600 = 35701^2 + 148140^2 .

It is a cyclic number.

It is not a de Polignac number, because 23220021001 - 2²¹ = 23217923849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23220021007) 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, 15018646 + ... + 15020191.

It is an arithmetic number, because the mean of its divisors is an integer number (5812515153).

Almost surely, 2^23220021001 is an apocalyptic number.

It is an amenable number.

23220021001 is a deficient number, since it is larger than the sum of its proper divisors (30039611).

23220021001 is an equidigital number, since it uses as much as digits as its factorization.

23220021001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30039610.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 23220021001 its reverse (10012002232), we get a palindrome (33232023233).

The spelling of 23220021001 in words is "twenty-three billion, two hundred twenty million, twenty-one thousand, one".