21010404153345 has 8 divisors (see below), whose sum is σ = 33616646645376. Its totient is φ = 11205548881776.

The previous prime is 21010404153317. The next prime is 21010404153367. The reversal of 21010404153345 is 54335140401012.

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

It is not a de Polignac number, because 21010404153345 - 2¹⁶ = 21010404087809 is a prime.

It is a Curzon 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, 700346805097 + ... + 700346805126.

It is an arithmetic number, because the mean of its divisors is an integer number (4202080830672).

Almost surely, 2^{21010404153345} is an apocalyptic number.

It is an amenable number.

21010404153345 is a deficient number, since it is larger than the sum of its proper divisors (12606242492031).

21010404153345 is a wasteful number, since it uses less digits than its factorization.

21010404153345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1400693610231.

The product of its (nonzero) digits is 28800, while the sum is 33.

Adding to 21010404153345 its reverse (54335140401012), we get a palindrome (75345544554357).

The spelling of 21010404153345 in words is "twenty-one trillion, ten billion, four hundred four million, one hundred fifty-three thousand, three hundred forty-five".