21022131132223 has 16 divisors (see below), whose sum is σ = 23631102242496. Its totient is φ = 18555398484480.

The previous prime is 21022131132217. The next prime is 21022131132239. The reversal of 21022131132223 is 32223113122012.

It is a de Polignac number, because none of the positive numbers 2^k-21022131132223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022131132263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10330540 + ... + 12196897.

It is an arithmetic number, because the mean of its divisors is an integer number (1476943890156).

Almost surely, 2^{21022131132223} is an apocalyptic number.

21022131132223 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21022131132223 is a deficient number, since it is larger than the sum of its proper divisors (2608971110273).

21022131132223 is a wasteful number, since it uses less digits than its factorization.

21022131132223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22530594.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 21022131132223 its reverse (32223113122012), we get a palindrome (53245244254235).

The spelling of 21022131132223 in words is "twenty-one trillion, twenty-two billion, one hundred thirty-one million, one hundred thirty-two thousand, two hundred twenty-three".