21103343001 has 12 divisors (see below), whose sum is σ = 32827422628. Its totient is φ = 12986672544.

The previous prime is 21103342987. The next prime is 21103343021. The reversal of 21103343001 is 10034330112.

21103343001 is a `hidden beast` number, since 21 + 10 + 334 + 300 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 12443179401 + 8660163600 = 111549^2 + 93060^2 .

It is not a de Polignac number, because 21103343001 - 2¹⁷ = 21103211929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21103343021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 90185110 + ... + 90185343.

Almost surely, 2^21103343001 is an apocalyptic number.

It is an amenable number.

21103343001 is a deficient number, since it is larger than the sum of its proper divisors (11724079627).

21103343001 is a wasteful number, since it uses less digits than its factorization.

21103343001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180370472 (or 180370469 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21103343001 its reverse (10034330112), we get a palindrome (31137673113).

The spelling of 21103343001 in words is "twenty-one billion, one hundred three million, three hundred forty-three thousand, one".