21102301355 has 8 divisors (see below), whose sum is σ = 25555081200. Its totient is φ = 16726961376.

The previous prime is 21102301351. The next prime is 21102301457. The reversal of 21102301355 is 55310320112.

It is a happy number.

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 21102301355 - 2² = 21102301351 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21102301355.

It is not an unprimeable number, because it can be changed into a prime (21102301351) 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, 19359365 + ... + 19360454.

It is an arithmetic number, because the mean of its divisors is an integer number (3194385150).

Almost surely, 2^21102301355 is an apocalyptic number.

21102301355 is a deficient number, since it is larger than the sum of its proper divisors (4452779845).

21102301355 is a wasteful number, since it uses less digits than its factorization.

21102301355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38719933.

The product of its (nonzero) digits is 900, while the sum is 23.

Adding to 21102301355 its reverse (55310320112), we get a palindrome (76412621467).

The spelling of 21102301355 in words is "twenty-one billion, one hundred two million, three hundred one thousand, three hundred fifty-five".