21443101353345 has 128 divisors (see below), whose sum is σ = 41823110246400. Its totient is φ = 9163351093248.

The previous prime is 21443101353341. The next prime is 21443101353347. The reversal of 21443101353345 is 54335310134412.

It is not a de Polignac number, because 21443101353345 - 2² = 21443101353341 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21443101353341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 133878229 + ... + 134038301.

It is an arithmetic number, because the mean of its divisors is an integer number (326743048800).

Almost surely, 2^{21443101353345} is an apocalyptic number.

It is an amenable number.

21443101353345 is a deficient number, since it is larger than the sum of its proper divisors (20380008893055).

21443101353345 is a wasteful number, since it uses less digits than its factorization.

21443101353345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160999.

The product of its (nonzero) digits is 259200, while the sum is 39.

Adding to 21443101353345 its reverse (54335310134412), we get a palindrome (75778411487757).

The spelling of 21443101353345 in words is "twenty-one trillion, four hundred forty-three billion, one hundred one million, three hundred fifty-three thousand, three hundred forty-five".