21115310650355 has 8 divisors (see below), whose sum is σ = 25338405079152. Its totient is φ = 16892226987808.

The previous prime is 21115310650351. The next prime is 21115310650381. The reversal of 21115310650355 is 55305601351112.

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

It is a cyclic number.

It is not a de Polignac number, because 21115310650355 - 2² = 21115310650351 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21115310650351) 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, 2551772 + ... + 6981558.

It is an arithmetic number, because the mean of its divisors is an integer number (3167300634894).

Almost surely, 2^{21115310650355} is an apocalyptic number.

21115310650355 is a deficient number, since it is larger than the sum of its proper divisors (4223094428797).

21115310650355 is an equidigital number, since it uses as much as digits as its factorization.

21115310650355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5383125.

The product of its (nonzero) digits is 67500, while the sum is 38.

The spelling of 21115310650355 in words is "twenty-one trillion, one hundred fifteen billion, three hundred ten million, six hundred fifty thousand, three hundred fifty-five".