21033311320513 has 8 divisors (see below), whose sum is σ = 22271702519808. Its totient is φ = 19795046520384.

The previous prime is 21033311320481. The next prime is 21033311320523. The reversal of 21033311320513 is 31502311333012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21033311320513 - 2⁵ = 21033311320481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21033311320523) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 31257081 + ... + 31922902.

It is an arithmetic number, because the mean of its divisors is an integer number (2783962814976).

Almost surely, 2^{21033311320513} is an apocalyptic number.

It is an amenable number.

21033311320513 is a deficient number, since it is larger than the sum of its proper divisors (1238391199295).

21033311320513 is a wasteful number, since it uses less digits than its factorization.

21033311320513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63199583.

The product of its (nonzero) digits is 4860, while the sum is 28.

Adding to 21033311320513 its reverse (31502311333012), we get a palindrome (52535622653525).

The spelling of 21033311320513 in words is "twenty-one trillion, thirty-three billion, three hundred eleven million, three hundred twenty thousand, five hundred thirteen".