21443001201 has 12 divisors (see below), whose sum is σ = 31810338612. Its totient is φ = 13908973536.

The previous prime is 21443001199. The next prime is 21443001257. The reversal of 21443001201 is 10210034412.

21443001201 is a `hidden beast` number, since 21 + 443 + 0 + 0 + 1 + 201 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 14774645601 + 6668355600 = 121551^2 + 81660^2 .

It is not a de Polignac number, because 21443001201 - 2¹ = 21443001199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21443001101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32196366 + ... + 32197031.

It is an arithmetic number, because the mean of its divisors is an integer number (2650861551).

Almost surely, 2^21443001201 is an apocalyptic number.

It is an amenable number.

21443001201 is a deficient number, since it is larger than the sum of its proper divisors (10367337411).

21443001201 is a wasteful number, since it uses less digits than its factorization.

21443001201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64393440 (or 64393437 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21443001201 its reverse (10210034412), we get a palindrome (31653035613).

The spelling of 21443001201 in words is "twenty-one billion, four hundred forty-three million, one thousand, two hundred one".