21213601550335 has 4 divisors (see below), whose sum is σ = 25456321860408. Its totient is φ = 16970881240264.

The previous prime is 21213601550329. The next prime is 21213601550363. The reversal of 21213601550335 is 53305510631212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21213601550335 - 2³ = 21213601550327 is a prime.

It is a super-2 number, since 2×21213601550335² (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 = 21213601550294 and 21213601550303.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2121360155029 + ... + 2121360155038.

It is an arithmetic number, because the mean of its divisors is an integer number (6364080465102).

Almost surely, 2^{21213601550335} is an apocalyptic number.

21213601550335 is a deficient number, since it is larger than the sum of its proper divisors (4242720310073).

21213601550335 is an equidigital number, since it uses as much as digits as its factorization.

21213601550335 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4242720310072.

The product of its (nonzero) digits is 81000, while the sum is 37.

The spelling of 21213601550335 in words is "twenty-one trillion, two hundred thirteen billion, six hundred one million, five hundred fifty thousand, three hundred thirty-five".