21701376233 has 2 divisors, whose sum is σ = 21701376234. Its totient is φ = 21701376232.

The previous prime is 21701376187. The next prime is 21701376239. The reversal of 21701376233 is 33267310712.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13564795024 + 8136581209 = 116468^2 + 90203^2 .

It is a cyclic number.

It is not a de Polignac number, because 21701376233 - 2¹⁰ = 21701375209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21701376193 and 21701376202.

It is not a weakly prime, because it can be changed into another prime (21701376239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10850688116 + 10850688117.

It is an arithmetic number, because the mean of its divisors is an integer number (10850688117).

Almost surely, 2^21701376233 is an apocalyptic number.

It is an amenable number.

21701376233 is a deficient number, since it is larger than the sum of its proper divisors (1).

21701376233 is an equidigital number, since it uses as much as digits as its factorization.

21701376233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31752, while the sum is 35.

Adding to 21701376233 its reverse (33267310712), we get a palindrome (54968686945).

The spelling of 21701376233 in words is "twenty-one billion, seven hundred one million, three hundred seventy-six thousand, two hundred thirty-three".