11212011221 has 8 divisors (see below), whose sum is σ = 11634346944. Its totient is φ = 10797020640.

The previous prime is 11212011203. The next prime is 11212011229. The reversal of 11212011221 is 12211021211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11212011221 - 2¹⁸ = 11211749077 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11212011196 and 11212011205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11212011229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1833176 + ... + 1839281.

It is an arithmetic number, because the mean of its divisors is an integer number (1454293368).

Almost surely, 2^11212011221 is an apocalyptic number.

It is an amenable number.

11212011221 is a deficient number, since it is larger than the sum of its proper divisors (422335723).

11212011221 is an equidigital number, since it uses as much as digits as its factorization.

11212011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3672571.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11212011221 its reverse (12211021211), we get a palindrome (23423032432).

The spelling of 11212011221 in words is "eleven billion, two hundred twelve million, eleven thousand, two hundred twenty-one".