21211002201201 has 4 divisors (see below), whose sum is σ = 28281336268272. Its totient is φ = 14140668134132.

The previous prime is 21211002201149. The next prime is 21211002201239. The reversal of 21211002201201 is 10210220011212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21211002201201 - 2¹⁰ = 21211002200177 is a prime.

It is a super-2 number, since 2×21211002201201² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21211002201901) 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 3 ways as a sum of consecutive naturals, for example, 3535167033531 + ... + 3535167033536.

It is an arithmetic number, because the mean of its divisors is an integer number (7070334067068).

Almost surely, 2^{21211002201201} is an apocalyptic number.

It is an amenable number.

21211002201201 is a deficient number, since it is larger than the sum of its proper divisors (7070334067071).

21211002201201 is an equidigital number, since it uses as much as digits as its factorization.

21211002201201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7070334067070.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21211002201201 its reverse (10210220011212), we get a palindrome (31421222212413).

The spelling of 21211002201201 in words is "twenty-one trillion, two hundred eleven billion, two million, two hundred one thousand, two hundred one".