21153206200355 has 8 divisors (see below), whose sum is σ = 25383875375232. Its totient is φ = 16922546337088.

The previous prime is 21153206200351. The next prime is 21153206200387. The reversal of 21153206200355 is 55300260235112.

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 21153206200355 - 2² = 21153206200351 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21153206200351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4479599 + ... + 7897671.

It is an arithmetic number, because the mean of its divisors is an integer number (3172984421904).

Almost surely, 2^{21153206200355} is an apocalyptic number.

21153206200355 is a deficient number, since it is larger than the sum of its proper divisors (4230669174877).

21153206200355 is a wasteful number, since it uses less digits than its factorization.

21153206200355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4655805.

The product of its (nonzero) digits is 54000, while the sum is 35.

Adding to 21153206200355 its reverse (55300260235112), we get a palindrome (76453466435467).

The spelling of 21153206200355 in words is "twenty-one trillion, one hundred fifty-three billion, two hundred six million, two hundred thousand, three hundred fifty-five".