21212431053335 has 8 divisors (see below), whose sum is σ = 25706946148416. Its totient is φ = 16801925586400.

The previous prime is 21212431053277. The next prime is 21212431053343. The reversal of 21212431053335 is 53335013421212.

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

It is not a de Polignac number, because 21212431053335 - 2⁶ = 21212431053271 is a prime.

It is a super-2 number, since 2×21212431053335² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21212431053295 and 21212431053304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21002406479 + ... + 21002407488.

It is an arithmetic number, because the mean of its divisors is an integer number (3213368268552).

Almost surely, 2^{21212431053335} is an apocalyptic number.

21212431053335 is a deficient number, since it is larger than the sum of its proper divisors (4494515095081).

21212431053335 is a wasteful number, since it uses less digits than its factorization.

21212431053335 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42004814073.

The product of its (nonzero) digits is 64800, while the sum is 35.

Adding to 21212431053335 its reverse (53335013421212), we get a palindrome (74547444474547).

The spelling of 21212431053335 in words is "twenty-one trillion, two hundred twelve billion, four hundred thirty-one million, fifty-three thousand, three hundred thirty-five".