21007282099 has 2 divisors, whose sum is σ = 21007282100. Its totient is φ = 21007282098.

The previous prime is 21007282069. The next prime is 21007282129. The reversal of 21007282099 is 99028270012.

It is a balanced prime because it is at equal distance from previous prime (21007282069) and next prime (21007282129).

It is a cyclic number.

It is not a de Polignac number, because 21007282099 - 2¹¹ = 21007280051 is a prime.

It is not a weakly prime, because it can be changed into another prime (21007282069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10503641049 + 10503641050.

It is an arithmetic number, because the mean of its divisors is an integer number (10503641050).

Almost surely, 2^21007282099 is an apocalyptic number.

21007282099 is a deficient number, since it is larger than the sum of its proper divisors (1).

21007282099 is an equidigital number, since it uses as much as digits as its factorization.

21007282099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 40.

The spelling of 21007282099 in words is "twenty-one billion, seven million, two hundred eighty-two thousand, ninety-nine".