21123303220231 has 8 divisors (see below), whose sum is σ = 21421154829600. Its totient is φ = 20825461063680.

The previous prime is 21123303220219. The next prime is 21123303220277. The reversal of 21123303220231 is 13202230332112.

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

It is a cyclic number.

It is not a de Polignac number, because 21123303220231 - 2³³ = 21114713285639 is a prime.

It is a super-2 number, since 2×21123303220231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21123303220196 and 21123303220205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21123303620231) 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, 2199175 + ... + 6861703.

It is an arithmetic number, because the mean of its divisors is an integer number (2677644353700).

Almost surely, 2^{21123303220231} is an apocalyptic number.

21123303220231 is a deficient number, since it is larger than the sum of its proper divisors (297851609369).

21123303220231 is an equidigital number, since it uses as much as digits as its factorization.

21123303220231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4726409.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 21123303220231 its reverse (13202230332112), we get a palindrome (34325533552343).

The spelling of 21123303220231 in words is "twenty-one trillion, one hundred twenty-three billion, three hundred three million, two hundred twenty thousand, two hundred thirty-one".