21110100019 has 8 divisors (see below), whose sum is σ = 21267198000. Its totient is φ = 20953583616.

The previous prime is 21110099971. The next prime is 21110100023. The reversal of 21110100019 is 91000101112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21110100019 is a prime.

It is a super-2 number, since 2×21110100019² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21110099975 and 21110100011.

It is not an unprimeable number, because it can be changed into a prime (21110100079) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72394 + ... + 217855.

It is an arithmetic number, because the mean of its divisors is an integer number (2658399750).

Almost surely, 2^21110100019 is an apocalyptic number.

21110100019 is a deficient number, since it is larger than the sum of its proper divisors (157097981).

21110100019 is a wasteful number, since it uses less digits than its factorization.

21110100019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290789.

The product of its (nonzero) digits is 18, while the sum is 16.

The spelling of 21110100019 in words is "twenty-one billion, one hundred ten million, one hundred thousand, nineteen".