21445302101200 has 60 divisors (see below), whose sum is σ = 51524892508320. Its totient is φ = 8577695582080.

The previous prime is 21445302101177. The next prime is 21445302101221. The reversal of 21445302101200 is 210120354412.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6812031 + ... + 9449569.

It is an arithmetic number, because the mean of its divisors is an integer number (858748208472).

Almost surely, 2^{21445302101200} is an apocalyptic number.

21445302101200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21445302101200 is an abundant number, since it is smaller than the sum of its proper divisors (30079590407120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21445302101200 is a wasteful number, since it uses less digits than its factorization.

21445302101200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2657884 (or 2657873 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 21445302101200 its reverse (210120354412), we get a palindrome (21655422455612).

The spelling of 21445302101200 in words is "twenty-one trillion, four hundred forty-five billion, three hundred two million, one hundred one thousand, two hundred".