21321312203033 has 4 divisors (see below), whose sum is σ = 21334815252240. Its totient is φ = 21307809153828.

The previous prime is 21321312202997. The next prime is 21321312203057. The reversal of 21321312203033 is 33030221312312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21321312203033 - 2¹² = 21321312198937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21321312202993 and 21321312203011.

It is not an unprimeable number, because it can be changed into a prime (21321312205033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6751522235 + ... + 6751525392.

It is an arithmetic number, because the mean of its divisors is an integer number (5333703813060).

Almost surely, 2^{21321312203033} is an apocalyptic number.

It is an amenable number.

21321312203033 is a deficient number, since it is larger than the sum of its proper divisors (13503049207).

21321312203033 is a wasteful number, since it uses less digits than its factorization.

21321312203033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13503049206.

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 21321312203033 its reverse (33030221312312), we get a palindrome (54351533515345).

The spelling of 21321312203033 in words is "twenty-one trillion, three hundred twenty-one billion, three hundred twelve million, two hundred three thousand, thirty-three".