21035201031211 has 4 divisors (see below), whose sum is σ = 21035215105632. Its totient is φ = 21035186956792.

The previous prime is 21035201031181. The next prime is 21035201031319. The reversal of 21035201031211 is 11213010253012.

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

It is a cyclic number.

It is not a de Polignac number, because 21035201031211 - 2¹⁹ = 21035200506923 is a prime.

It is a super-2 number, since 2×21035201031211² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21035201037211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4487395 + ... + 7887148.

It is an arithmetic number, because the mean of its divisors is an integer number (5258803776408).

Almost surely, 2^{21035201031211} is an apocalyptic number.

21035201031211 is a deficient number, since it is larger than the sum of its proper divisors (14074421).

21035201031211 is a wasteful number, since it uses less digits than its factorization.

21035201031211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14074420.

The product of its (nonzero) digits is 360, while the sum is 22.

Adding to 21035201031211 its reverse (11213010253012), we get a palindrome (32248211284223).

The spelling of 21035201031211 in words is "twenty-one trillion, thirty-five billion, two hundred one million, thirty-one thousand, two hundred eleven".