21301130523 has 8 divisors (see below), whose sum is σ = 28403339328. Its totient is φ = 14199837704.

The previous prime is 21301130483. The next prime is 21301130531. The reversal of 21301130523 is 32503110312.

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

It is a cyclic number.

It is not a de Polignac number, because 21301130523 - 2¹⁶ = 21301064987 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21301130523.

It is not an unprimeable number, because it can be changed into a prime (21301130423) 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, 172761 + ... + 269162.

It is an arithmetic number, because the mean of its divisors is an integer number (3550417416).

Almost surely, 2^21301130523 is an apocalyptic number.

21301130523 is a deficient number, since it is larger than the sum of its proper divisors (7102208805).

21301130523 is a wasteful number, since it uses less digits than its factorization.

21301130523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457993.

The product of its (nonzero) digits is 540, while the sum is 21.

Adding to 21301130523 its reverse (32503110312), we get a palindrome (53804240835).

The spelling of 21301130523 in words is "twenty-one billion, three hundred one million, one hundred thirty thousand, five hundred twenty-three".