21122234347 has 2 divisors, whose sum is σ = 21122234348. Its totient is φ = 21122234346.

The previous prime is 21122234291. The next prime is 21122234351. The reversal of 21122234347 is 74343222112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21122234347 - 2¹⁹ = 21121710059 is a prime.

It is a super-2 number, since 2×21122234347² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21122234377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10561117173 + 10561117174.

It is an arithmetic number, because the mean of its divisors is an integer number (10561117174).

Almost surely, 2^21122234347 is an apocalyptic number.

21122234347 is a deficient number, since it is larger than the sum of its proper divisors (1).

21122234347 is an equidigital number, since it uses as much as digits as its factorization.

21122234347 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 31.

Adding to 21122234347 its reverse (74343222112), we get a palindrome (95465456459).

The spelling of 21122234347 in words is "twenty-one billion, one hundred twenty-two million, two hundred thirty-four thousand, three hundred forty-seven".