21303062120 has 16 divisors (see below), whose sum is σ = 47931889860. Its totient is φ = 8521224832.

The previous prime is 21303062113. The next prime is 21303062141. The reversal of 21303062120 is 2126030312.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20604305764 + 698756356 = 143542^2 + 26434^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 21303062092 and 21303062101.

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 3 ways as a sum of consecutive naturals, for example, 266288237 + ... + 266288316.

Almost surely, 2^21303062120 is an apocalyptic number.

21303062120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21303062120 is an abundant number, since it is smaller than the sum of its proper divisors (26628827740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21303062120 is a wasteful number, since it uses less digits than its factorization.

21303062120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532576564 (or 532576560 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21303062120 its reverse (2126030312), we get a palindrome (23429092432).

The spelling of 21303062120 in words is "twenty-one billion, three hundred three million, sixty-two thousand, one hundred twenty".