21011649119 has 2 divisors, whose sum is σ = 21011649120. Its totient is φ = 21011649118.

The previous prime is 21011649091. The next prime is 21011649143. The reversal of 21011649119 is 91194611012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21011649119 - 2²⁴ = 20994871903 is a prime.

It is a super-2 number, since 2×21011649119² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21011649199) 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, 10505824559 + 10505824560.

It is an arithmetic number, because the mean of its divisors is an integer number (10505824560).

Almost surely, 2^21011649119 is an apocalyptic number.

21011649119 is a deficient number, since it is larger than the sum of its proper divisors (1).

21011649119 is an equidigital number, since it uses as much as digits as its factorization.

21011649119 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 35.

The spelling of 21011649119 in words is "twenty-one billion, eleven million, six hundred forty-nine thousand, one hundred nineteen".