21110102019 has 24 divisors (see below), whose sum is σ = 33985308240. Its totient is φ = 12548418048.

The previous prime is 21110102009. The next prime is 21110102021. The reversal of 21110102019 is 91020101112.

It is a happy number.

It is not a de Polignac number, because 21110102019 - 2¹¹ = 21110099971 is a prime.

It is a super-2 number, since 2×21110102019² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21110101992 and 21110102010.

It is not an unprimeable number, because it can be changed into a prime (21110102009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3628002 + ... + 3633815.

It is an arithmetic number, because the mean of its divisors is an integer number (1416054510).

Almost surely, 2^21110102019 is an apocalyptic number.

21110102019 is a deficient number, since it is larger than the sum of its proper divisors (12875206221).

21110102019 is a wasteful number, since it uses less digits than its factorization.

21110102019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7261859 (or 7261856 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 18.

The spelling of 21110102019 in words is "twenty-one billion, one hundred ten million, one hundred two thousand, nineteen".