21323202102231 has 4 divisors (see below), whose sum is σ = 28430936136312. Its totient is φ = 14215468068152.

The previous prime is 21323202102211. The next prime is 21323202102233. The reversal of 21323202102231 is 13220120232312.

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 21323202102231 - 2¹¹ = 21323202100183 is a prime.

It is a super-2 number, since 2×21323202102231² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21323202102233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3553867017036 + ... + 3553867017041.

It is an arithmetic number, because the mean of its divisors is an integer number (7107734034078).

Almost surely, 2^{21323202102231} is an apocalyptic number.

21323202102231 is a deficient number, since it is larger than the sum of its proper divisors (7107734034081).

21323202102231 is an equidigital number, since it uses as much as digits as its factorization.

21323202102231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7107734034080.

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

Adding to 21323202102231 its reverse (13220120232312), we get a palindrome (34543322334543).

The spelling of 21323202102231 in words is "twenty-one trillion, three hundred twenty-three billion, two hundred two million, one hundred two thousand, two hundred thirty-one".