21231311223033 has 6 divisors (see below), whose sum is σ = 30667449544394. Its totient is φ = 14154207482016.

The previous prime is 21231311223007. The next prime is 21231311223041. The reversal of 21231311223033 is 33032211313212.

21231311223033 is a `hidden beast` number, since 2 + 1 + 2 + 313 + 112 + 230 + 3 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 20984489059689 + 246822163344 = 4580883^2 + 496812^2 .

It is not a de Polignac number, because 21231311223033 - 2³² = 21227016255737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21231311222988 and 21231311223006.

It is not an unprimeable number, because it can be changed into a prime (21231311227033) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1179517290160 + ... + 1179517290177.

Almost surely, 2^{21231311223033} is an apocalyptic number.

It is an amenable number.

21231311223033 is a deficient number, since it is larger than the sum of its proper divisors (9436138321361).

21231311223033 is a wasteful number, since it uses less digits than its factorization.

21231311223033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2359034580343 (or 2359034580340 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

Adding to 21231311223033 its reverse (33032211313212), we get a palindrome (54263522536245).

The spelling of 21231311223033 in words is "twenty-one trillion, two hundred thirty-one billion, three hundred eleven million, two hundred twenty-three thousand, thirty-three".