21233111147 has 2 divisors, whose sum is σ = 21233111148. Its totient is φ = 21233111146.

The previous prime is 21233111093. The next prime is 21233111171. The reversal of 21233111147 is 74111133212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21233111147 - 2¹⁴ = 21233094763 is a prime.

It is not a weakly prime, because it can be changed into another prime (21233111747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10616555573 + 10616555574.

It is an arithmetic number, because the mean of its divisors is an integer number (10616555574).

Almost surely, 2^21233111147 is an apocalyptic number.

21233111147 is a deficient number, since it is larger than the sum of its proper divisors (1).

21233111147 is an equidigital number, since it uses as much as digits as its factorization.

21233111147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008, while the sum is 26.

Adding to 21233111147 its reverse (74111133212), we get a palindrome (95344244359).

The spelling of 21233111147 in words is "twenty-one billion, two hundred thirty-three million, one hundred eleven thousand, one hundred forty-seven".