21313331121033 has 24 divisors (see below), whose sum is σ = 35191626244736. Its totient is φ = 12176375932800.

The previous prime is 21313331121029. The next prime is 21313331121041. The reversal of 21313331121033 is 33012113331312.

21313331121033 is a `hidden beast` number, since 2 + 1 + 3 + 133 + 311 + 210 + 3 + 3 = 666.

It is not a de Polignac number, because 21313331121033 - 2² = 21313331121029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21313331120988 and 21313331121006.

It is not an unprimeable number, because it can be changed into a prime (21313331121053) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36799573 + ... + 37374258.

Almost surely, 2^{21313331121033} is an apocalyptic number.

It is an amenable number.

21313331121033 is a deficient number, since it is larger than the sum of its proper divisors (13878295123703).

21313331121033 is a wasteful number, since it uses less digits than its factorization.

21313331121033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74178405 (or 74178402 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 27.

Adding to 21313331121033 its reverse (33012113331312), we get a palindrome (54325444452345).

The spelling of 21313331121033 in words is "twenty-one trillion, three hundred thirteen billion, three hundred thirty-one million, one hundred twenty-one thousand, thirty-three".