21475339099 has 2 divisors, whose sum is σ = 21475339100. Its totient is φ = 21475339098.

The previous prime is 21475339049. The next prime is 21475339111. The reversal of 21475339099 is 99093357412.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21475339099 - 2⁷ = 21475338971 is a prime.

It is a super-2 number, since 2×21475339099² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21475339049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10737669549 + 10737669550.

It is an arithmetic number, because the mean of its divisors is an integer number (10737669550).

Almost surely, 2^21475339099 is an apocalyptic number.

21475339099 is a deficient number, since it is larger than the sum of its proper divisors (1).

21475339099 is an equidigital number, since it uses as much as digits as its factorization.

21475339099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1837080, while the sum is 52.

The spelling of 21475339099 in words is "twenty-one billion, four hundred seventy-five million, three hundred thirty-nine thousand, ninety-nine".