13011221211 has 16 divisors (see below), whose sum is σ = 17590509216. Its totient is φ = 8553102336.

The previous prime is 13011221191. The next prime is 13011221213. The reversal of 13011221211 is 11212211031.

It is not a de Polignac number, because 13011221211 - 2¹⁴ = 13011204827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13011221213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1623831 + ... + 1631823.

It is an arithmetic number, because the mean of its divisors is an integer number (1099406826).

Almost surely, 2^13011221211 is an apocalyptic number.

13011221211 is a deficient number, since it is larger than the sum of its proper divisors (4579288005).

13011221211 is an equidigital number, since it uses as much as digits as its factorization.

13011221211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15502.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 13011221211 its reverse (11212211031), we get a palindrome (24223432242).

The spelling of 13011221211 in words is "thirteen billion, eleven million, two hundred twenty-one thousand, two hundred eleven".