21030310001 has 4 divisors (see below), whose sum is σ = 21234487872. Its totient is φ = 20826132132.

The previous prime is 21030309959. The next prime is 21030310013. The reversal of 21030310001 is 10001303012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21030310001 - 2²⁶ = 20963201137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21030310051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102088781 + ... + 102088986.

It is an arithmetic number, because the mean of its divisors is an integer number (5308621968).

Almost surely, 2^21030310001 is an apocalyptic number.

It is an amenable number.

21030310001 is a deficient number, since it is larger than the sum of its proper divisors (204177871).

21030310001 is a wasteful number, since it uses less digits than its factorization.

21030310001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204177870.

The product of its (nonzero) digits is 18, while the sum is 11.

Adding to 21030310001 its reverse (10001303012), we get a palindrome (31031613013).

The spelling of 21030310001 in words is "twenty-one billion, thirty million, three hundred ten thousand, one".