21443512312101 has 8 divisors (see below), whose sum is σ = 31190563363104. Its totient is φ = 12996068067920.

The previous prime is 21443512312099. The next prime is 21443512312109. The reversal of 21443512312101 is 10121321534412.

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

It is a cyclic number.

It is not a de Polignac number, because 21443512312101 - 2¹ = 21443512312099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21443512312109) 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, 324901701666 + ... + 324901701731.

It is an arithmetic number, because the mean of its divisors is an integer number (3898820420388).

Almost surely, 2^{21443512312101} is an apocalyptic number.

It is an amenable number.

21443512312101 is a deficient number, since it is larger than the sum of its proper divisors (9747051051003).

21443512312101 is a wasteful number, since it uses less digits than its factorization.

21443512312101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649803403411.

The product of its (nonzero) digits is 5760, while the sum is 30.

Adding to 21443512312101 its reverse (10121321534412), we get a palindrome (31564833846513).

The spelling of 21443512312101 in words is "twenty-one trillion, four hundred forty-three billion, five hundred twelve million, three hundred twelve thousand, one hundred one".