21152430301 has 4 divisors (see below), whose sum is σ = 21153655900. Its totient is φ = 21151204704.

The previous prime is 21152430283. The next prime is 21152430307. The reversal of 21152430301 is 10303425112.

It is a happy number.

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 8963166276 + 12189264025 = 94674^2 + 110405^2 .

It is a cyclic number.

It is not a de Polignac number, because 21152430301 - 2⁹ = 21152429789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21152430307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 586536 + ... + 621553.

It is an arithmetic number, because the mean of its divisors is an integer number (5288413975).

Almost surely, 2^21152430301 is an apocalyptic number.

It is an amenable number.

21152430301 is a deficient number, since it is larger than the sum of its proper divisors (1225599).

21152430301 is a wasteful number, since it uses less digits than its factorization.

21152430301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1225598.

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 21152430301 its reverse (10303425112), we get a palindrome (31455855413).

The spelling of 21152430301 in words is "twenty-one billion, one hundred fifty-two million, four hundred thirty thousand, three hundred one".