21303001234 has 4 divisors (see below), whose sum is σ = 31954501854. Its totient is φ = 10651500616.

The previous prime is 21303001211. The next prime is 21303001249. The reversal of 21303001234 is 43210030312.

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

It can be written as a sum of positive squares in only one way, i.e., 18645083209 + 2657918025 = 136547^2 + 51555^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5325750307 + ... + 5325750310.

Almost surely, 2^21303001234 is an apocalyptic number.

21303001234 is a deficient number, since it is larger than the sum of its proper divisors (10651500620).

21303001234 is a wasteful number, since it uses less digits than its factorization.

21303001234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10651500619.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21303001234 its reverse (43210030312), we get a palindrome (64513031546).

The spelling of 21303001234 in words is "twenty-one billion, three hundred three million, one thousand, two hundred thirty-four".