21112671233 has 2 divisors, whose sum is σ = 21112671234. Its totient is φ = 21112671232.

The previous prime is 21112671197. The next prime is 21112671271. The reversal of 21112671233 is 33217621112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21108602944 + 4068289 = 145288^2 + 2017^2 .

It is a cyclic number.

It is not a de Polignac number, because 21112671233 - 2⁶ = 21112671169 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21112671196 and 21112671205.

It is not a weakly prime, because it can be changed into another prime (21112671133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556335616 + 10556335617.

It is an arithmetic number, because the mean of its divisors is an integer number (10556335617).

Almost surely, 2^21112671233 is an apocalyptic number.

It is an amenable number.

21112671233 is a deficient number, since it is larger than the sum of its proper divisors (1).

21112671233 is an equidigital number, since it uses as much as digits as its factorization.

21112671233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 29.

Subtracting from 21112671233 its sum of digits (29), we obtain a square (21112671204 = 145302²).

The spelling of 21112671233 in words is "twenty-one billion, one hundred twelve million, six hundred seventy-one thousand, two hundred thirty-three".