21443551100135 has 8 divisors (see below), whose sum is σ = 25735139380896. Its totient is φ = 17152922172960.

The previous prime is 21443551100131. The next prime is 21443551100207. The reversal of 21443551100135 is 53100115534412.

It is a happy number.

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

It is not a de Polignac number, because 21443551100135 - 2² = 21443551100131 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21443551100095 and 21443551100104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21443551100131) 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, 239789219 + ... + 239878628.

It is an arithmetic number, because the mean of its divisors is an integer number (3216892422612).

Almost surely, 2^{21443551100135} is an apocalyptic number.

21443551100135 is a deficient number, since it is larger than the sum of its proper divisors (4291588280761).

21443551100135 is an equidigital number, since it uses as much as digits as its factorization.

21443551100135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479676793.

The product of its (nonzero) digits is 36000, while the sum is 35.

Adding to 21443551100135 its reverse (53100115534412), we get a palindrome (74543666634547).

The spelling of 21443551100135 in words is "twenty-one trillion, four hundred forty-three billion, five hundred fifty-one million, one hundred thousand, one hundred thirty-five".