1222220011 has 12 divisors (see below), whose sum is σ = 1291553424. Its totient is φ = 1156438800.

The previous prime is 1222220009. The next prime is 1222220029. The reversal of 1222220011 is 1100222221.

It is a happy number.

It is not a de Polignac number, because 1222220011 - 2¹ = 1222220009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1222219973 and 1222220000.

It is not an unprimeable number, because it can be changed into a prime (1222220071) 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, 381426 + ... + 384616.

It is an arithmetic number, because the mean of its divisors is an integer number (107629452).

Almost surely, 2^1222220011 is an apocalyptic number.

1222220011 is a deficient number, since it is larger than the sum of its proper divisors (69333413).

1222220011 is a wasteful number, since it uses less digits than its factorization.

1222220011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4290 (or 4271 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1222220011 is about 34960.2633142258. The cubic root of 1222220011 is about 1069.1774652190.

Adding to 1222220011 its reverse (1100222221), we get a palindrome (2322442232).

The spelling of 1222220011 in words is "one billion, two hundred twenty-two million, two hundred twenty thousand, eleven".