21232313133 has 8 divisors (see below), whose sum is σ = 28311784128. Its totient is φ = 14153858784.

The previous prime is 21232313119. The next prime is 21232313273. The reversal of 21232313133 is 33131323212.

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

It is not a de Polignac number, because 21232313133 - 2⁴ = 21232313117 is a prime.

It is a super-2 number, since 2×21232313133² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21232313533) 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, 204016 + ... + 289977.

It is an arithmetic number, because the mean of its divisors is an integer number (3538973016).

Almost surely, 2^21232313133 is an apocalyptic number.

It is an amenable number.

21232313133 is a deficient number, since it is larger than the sum of its proper divisors (7079470995).

21232313133 is a wasteful number, since it uses less digits than its factorization.

21232313133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508323.

The product of its digits is 1944, while the sum is 24.

Adding to 21232313133 its reverse (33131323212), we get a palindrome (54363636345).

It can be divided in two parts, 212323 and 13133, that added together give a triangular number (225456 = T₆₇₁).

The spelling of 21232313133 in words is "twenty-one billion, two hundred thirty-two million, three hundred thirteen thousand, one hundred thirty-three".