23220231321 has 8 divisors (see below), whose sum is σ = 35383209664. Its totient is φ = 13268703600.

The previous prime is 23220231313. The next prime is 23220231343. The reversal of 23220231321 is 12313202232.

It is a happy number.

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

It is not a de Polignac number, because 23220231321 - 2³ = 23220231313 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: 1105725301 = 23220231321 / (2 + 3 + 2 + 2 + 0 + 2 + 3 + 1 + 3 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23220231311) 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, 552862630 + ... + 552862671.

It is an arithmetic number, because the mean of its divisors is an integer number (4422901208).

Almost surely, 2^23220231321 is an apocalyptic number.

23220231321 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

23220231321 is a deficient number, since it is larger than the sum of its proper divisors (12162978343).

23220231321 is a wasteful number, since it uses less digits than its factorization.

23220231321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105725311.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 23220231321 its reverse (12313202232), we get a palindrome (35533433553).

It can be divided in two parts, 23220 and 231321, that added together give a triangular number (254541 = T₇₁₃).

The spelling of 23220231321 in words is "twenty-three billion, two hundred twenty million, two hundred thirty-one thousand, three hundred twenty-one".