21232223020231 has 4 divisors (see below), whose sum is σ = 21232410338592. Its totient is φ = 21232035701872.

The previous prime is 21232223020193. The next prime is 21232223020241. The reversal of 21232223020231 is 13202032223212.

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

It is a cyclic number.

It is not a de Polignac number, because 21232223020231 - 2⁹ = 21232223019719 is a prime.

It is a super-2 number, since 2×21232223020231² (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 = 21232223020196 and 21232223020205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21232223020241) 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, 93489055 + ... + 93715888.

It is an arithmetic number, because the mean of its divisors is an integer number (5308102584648).

Almost surely, 2^{21232223020231} is an apocalyptic number.

21232223020231 is a deficient number, since it is larger than the sum of its proper divisors (187318361).

21232223020231 is a wasteful number, since it uses less digits than its factorization.

21232223020231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187318360.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 21232223020231 its reverse (13202032223212), we get a palindrome (34434255243443).

The spelling of 21232223020231 in words is "twenty-one trillion, two hundred thirty-two billion, two hundred twenty-three million, twenty thousand, two hundred thirty-one".