21013103033 has 8 divisors (see below), whose sum is σ = 22632069768. Its totient is φ = 19394504064.

The previous prime is 21013103021. The next prime is 21013103057. The reversal of 21013103033 is 33030131012.

It can be written as a sum of positive squares in 4 ways, for example, as 12166144 + 21000936889 = 3488^2 + 144917^2 .

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

It is not a de Polignac number, because 21013103033 - 2⁸ = 21013102777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21013103093) 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, 33035 + ... + 207647.

It is an arithmetic number, because the mean of its divisors is an integer number (2829008721).

Almost surely, 2^21013103033 is an apocalyptic number.

It is an amenable number.

21013103033 is a deficient number, since it is larger than the sum of its proper divisors (1618966735).

21013103033 is a wasteful number, since it uses less digits than its factorization.

21013103033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183883.

The product of its (nonzero) digits is 162, while the sum is 17.

Adding to 21013103033 its reverse (33030131012), we get a palindrome (54043234045).

The spelling of 21013103033 in words is "twenty-one billion, thirteen million, one hundred three thousand, thirty-three".