21110201019 has 8 divisors (see below), whose sum is σ = 31274371920. Its totient is φ = 14073467328.

The previous prime is 21110201017. The next prime is 21110201029. The reversal of 21110201019 is 91010201112.

It is a happy number.

It is not a de Polignac number, because 21110201019 - 2¹ = 21110201017 is a prime.

It is a super-2 number, since 2×21110201019² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21110200992 and 21110201010.

It is not an unprimeable number, because it can be changed into a prime (21110201017) 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 in 7 ways as a sum of consecutive naturals, for example, 390929622 + ... + 390929675.

It is an arithmetic number, because the mean of its divisors is an integer number (3909296490).

Almost surely, 2^21110201019 is an apocalyptic number.

21110201019 is a deficient number, since it is larger than the sum of its proper divisors (10164170901).

21110201019 is an equidigital number, since it uses as much as digits as its factorization.

21110201019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 781859306 (or 781859300 counting only the distinct ones).

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

The spelling of 21110201019 in words is "twenty-one billion, one hundred ten million, two hundred one thousand, nineteen".