21444054134225 has 12 divisors (see below), whose sum is σ = 26656937929740. Its totient is φ = 17112462144000.

The previous prime is 21444054134189. The next prime is 21444054134303. The reversal of 21444054134225 is 52243145044412.

It can be written as a sum of positive squares in 6 ways, for example, as 96318363904 + 21347735770321 = 310352^2 + 4620361^2 .

It is not a de Polignac number, because 21444054134225 - 2³⁰ = 21442980392401 is a prime.

It is a super-3 number, since 3×21444054134225³ (a number of 41 digits) contains 333 as substring.

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, 1069518860 + ... + 1069538909.

It is an arithmetic number, because the mean of its divisors is an integer number (2221411494145).

Almost surely, 2^{21444054134225} is an apocalyptic number.

21444054134225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21444054134225 is a deficient number, since it is larger than the sum of its proper divisors (5212883795515).

21444054134225 is a wasteful number, since it uses less digits than its factorization.

21444054134225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2139058180 (or 2139058175 counting only the distinct ones).

The product of its (nonzero) digits is 614400, while the sum is 41.

Adding to 21444054134225 its reverse (52243145044412), we get a palindrome (73687199178637).

The spelling of 21444054134225 in words is "twenty-one trillion, four hundred forty-four billion, fifty-four million, one hundred thirty-four thousand, two hundred twenty-five".