21301211230 has 32 divisors (see below), whose sum is σ = 41535950400. Its totient is φ = 7865054496.

The previous prime is 21301211179. The next prime is 21301211249. The reversal of 21301211230 is 3211210312.

It is a super-2 number, since 2×21301211230² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 462810 + ... + 506749.

It is an arithmetic number, because the mean of its divisors is an integer number (1297998450).

Almost surely, 2^21301211230 is an apocalyptic number.

21301211230 is a deficient number, since it is larger than the sum of its proper divisors (20234739170).

21301211230 is an equidigital number, since it uses as much as digits as its factorization.

21301211230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 969605 (or 969579 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21301211230 its reverse (3211210312), we get a palindrome (24512421542).

The spelling of 21301211230 in words is "twenty-one billion, three hundred one million, two hundred eleven thousand, two hundred thirty".