21231321020223 has 8 divisors (see below), whose sum is σ = 29221603124736. Its totient is φ = 13697626464600.

The previous prime is 21231321020209. The next prime is 21231321020237. The reversal of 21231321020223 is 32202012313212.

It is an interprime number because it is at equal distance from previous prime (21231321020209) and next prime (21231321020237).

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

It is not a de Polignac number, because 21231321020223 - 2⁵ = 21231321020191 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21231321020193 and 21231321020202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21231321020243) 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, 114146887113 + ... + 114146887298.

It is an arithmetic number, because the mean of its divisors is an integer number (3652700390592).

Almost surely, 2^{21231321020223} is an apocalyptic number.

21231321020223 is a deficient number, since it is larger than the sum of its proper divisors (7990282104513).

21231321020223 is a wasteful number, since it uses less digits than its factorization.

21231321020223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228293774445.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 21231321020223 its reverse (32202012313212), we get a palindrome (53433333333435).

The spelling of 21231321020223 in words is "twenty-one trillion, two hundred thirty-one billion, three hundred twenty-one million, twenty thousand, two hundred twenty-three".