1221211122 has 32 divisors (see below), whose sum is σ = 2510965824. Its totient is φ = 395668800.

The previous prime is 1221211067. The next prime is 1221211127. The reversal of 1221211122 is 2211121221.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1221211127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 284472 + ... + 288732.

It is an arithmetic number, because the mean of its divisors is an integer number (78467682).

Almost surely, 2^1221211122 is an apocalyptic number.

1221211122 is an abundant number, since it is smaller than the sum of its proper divisors (1289754702).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221211122 is a wasteful number, since it uses less digits than its factorization.

1221211122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5594.

The product of its digits is 32, while the sum is 15.

The square root of 1221211122 is about 34945.8312535272. The cubic root of 1221211122 is about 1068.8831978717.

Adding to 1221211122 its reverse (2211121221), we get a palindrome (3432332343).

The spelling of 1221211122 in words is "one billion, two hundred twenty-one million, two hundred eleven thousand, one hundred twenty-two".