11212202221 has 8 divisors (see below), whose sum is σ = 12239758944. Its totient is φ = 10186023120.

The previous prime is 11212202207. The next prime is 11212202249. The reversal of 11212202221 is 12220221211.

It is a happy number.

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 11212202221 - 2¹¹ = 11212200173 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11212202195 and 11212202204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11212202201) 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, 327346 + ... + 359971.

It is an arithmetic number, because the mean of its divisors is an integer number (1529969868).

Almost surely, 2^11212202221 is an apocalyptic number.

11212202221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11212202221 is a deficient number, since it is larger than the sum of its proper divisors (1027556723).

11212202221 is a wasteful number, since it uses less digits than its factorization.

11212202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688811.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 11212202221 its reverse (12220221211), we get a palindrome (23432423432).

The spelling of 11212202221 in words is "eleven billion, two hundred twelve million, two hundred two thousand, two hundred twenty-one".