21100203032233 has 8 divisors (see below), whose sum is σ = 22732791342408. Its totient is φ = 19468971260544.

The previous prime is 21100203032231. The next prime is 21100203032269. The reversal of 21100203032233 is 33223030200112.

It can be written as a sum of positive squares in 4 ways, for example, as 145158714009 + 20955044318224 = 380997^2 + 4577668^2 .

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

It is not a de Polignac number, because 21100203032233 - 2¹ = 21100203032231 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21100203032231) 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, 339102310 + ... + 339164527.

It is an arithmetic number, because the mean of its divisors is an integer number (2841598917801).

Almost surely, 2^{21100203032233} is an apocalyptic number.

It is an amenable number.

21100203032233 is a deficient number, since it is larger than the sum of its proper divisors (1632588310175).

21100203032233 is a wasteful number, since it uses less digits than its factorization.

21100203032233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678269243.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 21100203032233 its reverse (33223030200112), we get a palindrome (54323233232345).

The spelling of 21100203032233 in words is "twenty-one trillion, one hundred billion, two hundred three million, thirty-two thousand, two hundred thirty-three".