21232229971 has 2 divisors, whose sum is σ = 21232229972. Its totient is φ = 21232229970.

The previous prime is 21232229957. The next prime is 21232229981. The reversal of 21232229971 is 17992223212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21232229971 - 2⁵ = 21232229939 is a prime.

It is not a weakly prime, because it can be changed into another prime (21232229981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10616114985 + 10616114986.

It is an arithmetic number, because the mean of its divisors is an integer number (10616114986).

Almost surely, 2^21232229971 is an apocalyptic number.

21232229971 is a deficient number, since it is larger than the sum of its proper divisors (1).

21232229971 is an equidigital number, since it uses as much as digits as its factorization.

21232229971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 40.

The spelling of 21232229971 in words is "twenty-one billion, two hundred thirty-two million, two hundred twenty-nine thousand, nine hundred seventy-one".