21013302011201 has 4 divisors (see below), whose sum is σ = 21026361864900. Its totient is φ = 21000242157504.

The previous prime is 21013302011189. The next prime is 21013302011227. The reversal of 21013302011201 is 10211020331012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19715242834225 + 1298059176976 = 4440185^2 + 1139324^2 .

It is a cyclic number.

It is not a de Polignac number, because 21013302011201 - 2⁶ = 21013302011137 is a prime.

It is a super-2 number, since 2×21013302011201² (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 21013302011201.

It is not an unprimeable number, because it can be changed into a prime (21013302010201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6529924436 + ... + 6529927653.

It is an arithmetic number, because the mean of its divisors is an integer number (5256590466225).

Almost surely, 2^{21013302011201} is an apocalyptic number.

It is an amenable number.

21013302011201 is a deficient number, since it is larger than the sum of its proper divisors (13059853699).

21013302011201 is a wasteful number, since it uses less digits than its factorization.

21013302011201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13059853698.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21013302011201 its reverse (10211020331012), we get a palindrome (31224322342213).

The spelling of 21013302011201 in words is "twenty-one trillion, thirteen billion, three hundred two million, eleven thousand, two hundred one".