21049009119 has 12 divisors (see below), whose sum is σ = 32192602416. Its totient is φ = 13207221312.

The previous prime is 21049009099. The next prime is 21049009139. The reversal of 21049009119 is 91190094012.

It is an interprime number because it is at equal distance from previous prime (21049009099) and next prime (21049009139).

It is not a de Polignac number, because 21049009119 - 2¹⁷ = 21048878047 is a prime.

It is a super-2 number, since 2×21049009119² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21049009139) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68787459 + ... + 68787764.

It is an arithmetic number, because the mean of its divisors is an integer number (2682716868).

Almost surely, 2^21049009119 is an apocalyptic number.

21049009119 is a deficient number, since it is larger than the sum of its proper divisors (11143593297).

21049009119 is a wasteful number, since it uses less digits than its factorization.

21049009119 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137575246 (or 137575243 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The spelling of 21049009119 in words is "twenty-one billion, forty-nine million, nine thousand, one hundred nineteen".