21231333222133 has 8 divisors (see below), whose sum is σ = 21916495274240. Its totient is φ = 20546188691040.

The previous prime is 21231333222107. The next prime is 21231333222247. The reversal of 21231333222133 is 33122233313212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21231333222133 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21231333222095 and 21231333222104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21231303222133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1895235 + ... + 6786352.

It is an arithmetic number, because the mean of its divisors is an integer number (2739561909280).

Almost surely, 2^{21231333222133} is an apocalyptic number.

It is an amenable number.

21231333222133 is a deficient number, since it is larger than the sum of its proper divisors (685162052107).

21231333222133 is an equidigital number, since it uses as much as digits as its factorization.

21231333222133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8760507.

The product of its digits is 23328, while the sum is 31.

Adding to 21231333222133 its reverse (33122233313212), we get a palindrome (54353566535345).

The spelling of 21231333222133 in words is "twenty-one trillion, two hundred thirty-one billion, three hundred thirty-three million, two hundred twenty-two thousand, one hundred thirty-three".