21000113222201 has 8 divisors (see below), whose sum is σ = 21094912602504. Its totient is φ = 20905353758080.

The previous prime is 21000113222167. The next prime is 21000113222219. The reversal of 21000113222201 is 10222231100012.

It can be written as a sum of positive squares in 4 ways, for example, as 882376543801 + 20117736678400 = 939349^2 + 4485280^2 .

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 21000113222201 - 2²⁶ = 21000046113337 is a prime.

It is a super-2 number, since 2×21000113222201² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21000113222201.

It is not an unprimeable number, because it can be changed into a prime (21000113422201) 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, 8924210 + ... + 11029131.

It is an arithmetic number, because the mean of its divisors is an integer number (2636864075313).

Almost surely, 2^{21000113222201} is an apocalyptic number.

It is an amenable number.

21000113222201 is a deficient number, since it is larger than the sum of its proper divisors (94799380303).

21000113222201 is a wasteful number, since it uses less digits than its factorization.

21000113222201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19958091.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21000113222201 its reverse (10222231100012), we get a palindrome (31222344322213).

The spelling of 21000113222201 in words is "twenty-one trillion, one hundred thirteen million, two hundred twenty-two thousand, two hundred one".