10511220405211 has 4 divisors (see below), whose sum is σ = 10511249197032. Its totient is φ = 10511191613392.

The previous prime is 10511220405157. The next prime is 10511220405221. The reversal of 10511220405211 is 11250402211501.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10511220405211 is a prime.

It is a super-2 number, since 2×10511220405211² (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 (10511220405221) 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, 13841170 + ... + 14580823.

It is an arithmetic number, because the mean of its divisors is an integer number (2627812299258).

Almost surely, 2^{10511220405211} is an apocalyptic number.

10511220405211 is a deficient number, since it is larger than the sum of its proper divisors (28791821).

10511220405211 is an equidigital number, since it uses as much as digits as its factorization.

10511220405211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28791820.

The product of its (nonzero) digits is 800, while the sum is 25.

Adding to 10511220405211 its reverse (11250402211501), we get a palindrome (21761622616712).

The spelling of 10511220405211 in words is "ten trillion, five hundred eleven billion, two hundred twenty million, four hundred five thousand, two hundred eleven".