21033220103 has 8 divisors (see below), whose sum is σ = 24038986272. Its totient is φ = 18027709056.

The previous prime is 21033220081. The next prime is 21033220139. The reversal of 21033220103 is 30102233012.

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

It is not a de Polignac number, because 21033220103 - 2¹² = 21033216007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21033220193) 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, 170051 + ... + 266427.

It is an arithmetic number, because the mean of its divisors is an integer number (3004873284).

Almost surely, 2^21033220103 is an apocalyptic number.

21033220103 is a deficient number, since it is larger than the sum of its proper divisors (3005766169).

21033220103 is an equidigital number, since it uses as much as digits as its factorization.

21033220103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127561.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21033220103 its reverse (30102233012), we get a palindrome (51135453115).

The spelling of 21033220103 in words is "twenty-one billion, thirty-three million, two hundred twenty thousand, one hundred three".