21120120324303 has 128 divisors (see below), whose sum is σ = 38857706280960. Its totient is φ = 9847118315520.

The previous prime is 21120120324301. The next prime is 21120120324323. The reversal of 21120120324303 is 30342302102112.

It is not a de Polignac number, because 21120120324303 - 2¹ = 21120120324301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120120324301) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 165380451 + ... + 165508107.

It is an arithmetic number, because the mean of its divisors is an integer number (303575830320).

Almost surely, 2^{21120120324303} is an apocalyptic number.

21120120324303 is a deficient number, since it is larger than the sum of its proper divisors (17737585956657).

21120120324303 is a wasteful number, since it uses less digits than its factorization.

21120120324303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129217.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 21120120324303 its reverse (30342302102112), we get a palindrome (51462422426415).

The spelling of 21120120324303 in words is "twenty-one trillion, one hundred twenty billion, one hundred twenty million, three hundred twenty-four thousand, three hundred three".