11211012221 has 8 divisors (see below), whose sum is σ = 11324214624. Its totient is φ = 11097853200.

The previous prime is 11211012217. The next prime is 11211012223. The reversal of 11211012221 is 12221011211.

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 11211012221 - 2² = 11211012217 is a prime.

It is a super-2 number, since 2×11211012221² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11211012196 and 11211012205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11211012223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 846170 + ... + 859316.

It is an arithmetic number, because the mean of its divisors is an integer number (1415526828).

Almost surely, 2^11211012221 is an apocalyptic number.

It is an amenable number.

11211012221 is a deficient number, since it is larger than the sum of its proper divisors (113202403).

11211012221 is a wasteful number, since it uses less digits than its factorization.

11211012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21691.

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

Adding to 11211012221 its reverse (12221011211), we get a palindrome (23432023432).

The spelling of 11211012221 in words is "eleven billion, two hundred eleven million, twelve thousand, two hundred twenty-one".