1222211211222 has 32 divisors (see below), whose sum is σ = 2546483909760. Its totient is φ = 390730326080.

The previous prime is 1222211211211. The next prime is 1222211211239. The reversal of 1222211211222 is 2221121122221.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42090048 + ... + 42119075.

It is an arithmetic number, because the mean of its divisors is an integer number (79577622180).

Almost surely, 2^{1222211211222} is an apocalyptic number.

1222211211222 is an abundant number, since it is smaller than the sum of its proper divisors (1324272698538).

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

1222211211222 is a wasteful number, since it uses less digits than its factorization.

1222211211222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84209228.

The product of its digits is 256, while the sum is 21.

Adding to 1222211211222 its reverse (2221121122221), we get a palindrome (3443332333443).

The spelling of 1222211211222 in words is "one trillion, two hundred twenty-two billion, two hundred eleven million, two hundred eleven thousand, two hundred twenty-two".