11022222001221 has 12 divisors (see below), whose sum is σ = 15921370215660. Its totient is φ = 7347971286720.

The previous prime is 11022222001211. The next prime is 11022222001243. The reversal of 11022222001221 is 12210022222011.

It is a happy number.

11022222001221 is a `hidden beast` number, since 1 + 1 + 0 + 222 + 220 + 0 + 1 + 221 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5963906136321 + 5058315864900 = 2442111^2 + 2249070^2 .

It is not a de Polignac number, because 11022222001221 - 2⁹ = 11022222000709 is a prime.

It is a super-2 number, since 2×11022222001221² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11022222001194 and 11022222001203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11022222001211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14330586 + ... + 15080123.

It is an arithmetic number, because the mean of its divisors is an integer number (1326780851305).

Almost surely, 2^{11022222001221} is an apocalyptic number.

It is an amenable number.

11022222001221 is a deficient number, since it is larger than the sum of its proper divisors (4899148214439).

11022222001221 is a wasteful number, since it uses less digits than its factorization.

11022222001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29452356 (or 29452353 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 11022222001221 its reverse (12210022222011), we get a palindrome (23232244223232).

The spelling of 11022222001221 in words is "eleven trillion, twenty-two billion, two hundred twenty-two million, one thousand, two hundred twenty-one".