213123321020033 has 4 divisors (see below), whose sum is σ = 213123470226900. Its totient is φ = 213123171813168.

The previous prime is 213123321020011. The next prime is 213123321020047. The reversal of 213123321020033 is 330020123321312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 146333368629889 + 66789952390144 = 12096833^2 + 8172512^2 .

It is a cyclic number.

It is not a de Polignac number, because 213123321020033 - 2²² = 213123316825729 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213123321019984 and 213123321020011.

It is not an unprimeable number, because it can be changed into a prime (213123321020083) 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, 72439958 + ... + 75324591.

It is an arithmetic number, because the mean of its divisors is an integer number (53280867556725).

Almost surely, 2^{213123321020033} is an apocalyptic number.

It is an amenable number.

213123321020033 is a deficient number, since it is larger than the sum of its proper divisors (149206867).

213123321020033 is a wasteful number, since it uses less digits than its factorization.

213123321020033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149206866.

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

Adding to 213123321020033 its reverse (330020123321312), we get a palindrome (543143444341345).

The spelling of 213123321020033 in words is "two hundred thirteen trillion, one hundred twenty-three billion, three hundred twenty-one million, twenty thousand, thirty-three".