21323231233111 has 2 divisors, whose sum is σ = 21323231233112. Its totient is φ = 21323231233110.

The previous prime is 21323231233103. The next prime is 21323231233169. The reversal of 21323231233111 is 11133213232312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21323231233111 - 2³ = 21323231233103 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21323231233111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21323232233111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10661615616555 + 10661615616556.

It is an arithmetic number, because the mean of its divisors is an integer number (10661615616556).

Almost surely, 2^{21323231233111} is an apocalyptic number.

21323231233111 is a deficient number, since it is larger than the sum of its proper divisors (1).

21323231233111 is an equidigital number, since it uses as much as digits as its factorization.

21323231233111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 28.

Adding to 21323231233111 its reverse (11133213232312), we get a palindrome (32456444465423).

The spelling of 21323231233111 in words is "twenty-one trillion, three hundred twenty-three billion, two hundred thirty-one million, two hundred thirty-three thousand, one hundred eleven".