21103033110 has 32 divisors (see below), whose sum is σ = 50746819680. Its totient is φ = 5616415488.

The previous prime is 21103033109. The next prime is 21103033111. The reversal of 21103033110 is 1133030112.

It is an interprime number because it is at equal distance from previous prime (21103033109) and next prime (21103033111).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21103033110.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21103033111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 675727 + ... + 706266.

It is an arithmetic number, because the mean of its divisors is an integer number (1585838115).

Almost surely, 2^21103033110 is an apocalyptic number.

21103033110 is an abundant number, since it is smaller than the sum of its proper divisors (29643786570).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21103033110 is a wasteful number, since it uses less digits than its factorization.

21103033110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1382512.

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 21103033110 its reverse (1133030112), we get a palindrome (22236063222).

The spelling of 21103033110 in words is "twenty-one billion, one hundred three million, thirty-three thousand, one hundred ten".