21203210120323 has 16 divisors (see below), whose sum is σ = 26439206976000. Its totient is φ = 16519459464000.

The previous prime is 21203210120321. The next prime is 21203210120381. The reversal of 21203210120323 is 32302101230212.

It is a cyclic number.

It is not a de Polignac number, because 21203210120323 - 2¹ = 21203210120321 is a prime.

It is a super-2 number, since 2×21203210120323² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21203210120294 and 21203210120303.

It is not an unprimeable number, because it can be changed into a prime (21203210120321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20512698 + ... + 21521551.

It is an arithmetic number, because the mean of its divisors is an integer number (1652450436000).

Almost surely, 2^{21203210120323} is an apocalyptic number.

21203210120323 is a deficient number, since it is larger than the sum of its proper divisors (5235996855677).

21203210120323 is a wasteful number, since it uses less digits than its factorization.

21203210120323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42040818.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21203210120323 its reverse (32302101230212), we get a palindrome (53505311350535).

The spelling of 21203210120323 in words is "twenty-one trillion, two hundred three billion, two hundred ten million, one hundred twenty thousand, three hundred twenty-three".