21152361300245 has 16 divisors (see below), whose sum is σ = 29012355061248. Its totient is φ = 14502775109760.

The previous prime is 21152361300233. The next prime is 21152361300263. The reversal of 21152361300245 is 54200316325112.

It is not a de Polignac number, because 21152361300245 - 2¹⁶ = 21152361234709 is a prime.

It is a super-3 number, since 3×21152361300245³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35139176 + ... + 35736065.

It is an arithmetic number, because the mean of its divisors is an integer number (1813272191328).

Almost surely, 2^{21152361300245} is an apocalyptic number.

It is an amenable number.

21152361300245 is a deficient number, since it is larger than the sum of its proper divisors (7859993761003).

21152361300245 is an equidigital number, since it uses as much as digits as its factorization.

21152361300245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70883780.

The product of its (nonzero) digits is 43200, while the sum is 35.

Adding to 21152361300245 its reverse (54200316325112), we get a palindrome (75352677625357).

The spelling of 21152361300245 in words is "twenty-one trillion, one hundred fifty-two billion, three hundred sixty-one million, three hundred thousand, two hundred forty-five".