11211002223221 has 8 divisors (see below), whose sum is σ = 11871557299800. Its totient is φ = 10550567630848.

The previous prime is 11211002223143. The next prime is 11211002223257. The reversal of 11211002223221 is 12232220011211.

It can be written as a sum of positive squares in 4 ways, for example, as 139211818321 + 11071790404900 = 373111^2 + 3327430^2 .

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

It is not a de Polignac number, because 11211002223221 - 2¹⁰ = 11211002222197 is a prime.

It is a super-2 number, since 2×11211002223221² (a number of 27 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 = 11211002223193 and 11211002223202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11211002223271) 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, 29929436 + ... + 30301701.

It is an arithmetic number, because the mean of its divisors is an integer number (1483944662475).

Almost surely, 2^{11211002223221} is an apocalyptic number.

It is an amenable number.

11211002223221 is a deficient number, since it is larger than the sum of its proper divisors (660555076579).

11211002223221 is a wasteful number, since it uses less digits than its factorization.

11211002223221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60242103.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 11211002223221 its reverse (12232220011211), we get a palindrome (23443222234432).

The spelling of 11211002223221 in words is "eleven trillion, two hundred eleven billion, two million, two hundred twenty-three thousand, two hundred twenty-one".