11211101011221 has 32 divisors (see below), whose sum is σ = 16160733388800. Its totient is φ = 6889074649920.

The previous prime is 11211101011169. The next prime is 11211101011273. The reversal of 11211101011221 is 12211010111211.

It is an interprime number because it is at equal distance from previous prime (11211101011169) and next prime (11211101011273).

It is not a de Polignac number, because 11211101011221 - 2⁷ = 11211101011093 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11211101011221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11211108011221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 69919740 + ... + 70079898.

It is an arithmetic number, because the mean of its divisors is an integer number (505022918400).

Almost surely, 2^{11211101011221} is an apocalyptic number.

It is an amenable number.

11211101011221 is a deficient number, since it is larger than the sum of its proper divisors (4949632377579).

11211101011221 is a wasteful number, since it uses less digits than its factorization.

11211101011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193409.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 11211101011221 its reverse (12211010111211), we get a palindrome (23422111122432).

The spelling of 11211101011221 in words is "eleven trillion, two hundred eleven billion, one hundred one million, eleven thousand, two hundred twenty-one".