21012222330133 has 4 divisors (see below), whose sum is σ = 21064621887468. Its totient is φ = 20959822772800.

The previous prime is 21012222330119. The next prime is 21012222330179. The reversal of 21012222330133 is 33103322221012.

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 17978083363249 + 3034138966884 = 4240057^2 + 1741878^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21012222330133 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21012222330098 and 21012222330107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21012222330103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26199778066 + ... + 26199778867.

It is an arithmetic number, because the mean of its divisors is an integer number (5266155471867).

Almost surely, 2^{21012222330133} is an apocalyptic number.

It is an amenable number.

21012222330133 is a deficient number, since it is larger than the sum of its proper divisors (52399557335).

21012222330133 is an equidigital number, since it uses as much as digits as its factorization.

21012222330133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52399557334.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 21012222330133 its reverse (33103322221012), we get a palindrome (54115544551145).

The spelling of 21012222330133 in words is "twenty-one trillion, twelve billion, two hundred twenty-two million, three hundred thirty thousand, one hundred thirty-three".