23232220221 has 8 divisors (see below), whose sum is σ = 35401478464. Its totient is φ = 13275554400.

The previous prime is 23232220217. The next prime is 23232220261. The reversal of 23232220221 is 12202223232.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 23232220221 - 2² = 23232220217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 1106296201 = 23232220221 / (2 + 3 + 2 + 3 + 2 + 2 + 2 + 0 + 2 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23232220261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 553148080 + ... + 553148121.

It is an arithmetic number, because the mean of its divisors is an integer number (4425184808).

Almost surely, 2^23232220221 is an apocalyptic number.

23232220221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

23232220221 is a deficient number, since it is larger than the sum of its proper divisors (12169258243).

23232220221 is a wasteful number, since it uses less digits than its factorization.

23232220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1106296211.

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 23232220221 its reverse (12202223232), we get a palindrome (35434443453).

The spelling of 23232220221 in words is "twenty-three billion, two hundred thirty-two million, two hundred twenty thousand, two hundred twenty-one".