21101103030233 has 4 divisors (see below), whose sum is σ = 21101125749300. Its totient is φ = 21101080311168.

The previous prime is 21101103030221. The next prime is 21101103030251. The reversal of 21101103030233 is 33203030110112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3731646472009 + 17369456558224 = 1931747^2 + 4167668^2 .

It is a cyclic number.

It is not a de Polignac number, because 21101103030233 - 2¹⁴ = 21101103013849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21101103030283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9904208 + ... + 11844641.

It is an arithmetic number, because the mean of its divisors is an integer number (5275281437325).

Almost surely, 2^{21101103030233} is an apocalyptic number.

It is an amenable number.

21101103030233 is a deficient number, since it is larger than the sum of its proper divisors (22719067).

21101103030233 is an equidigital number, since it uses as much as digits as its factorization.

21101103030233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22719066.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 21101103030233 its reverse (33203030110112), we get a palindrome (54304133140345).

The spelling of 21101103030233 in words is "twenty-one trillion, one hundred one billion, one hundred three million, thirty thousand, two hundred thirty-three".