1212220111222 has 16 divisors (see below), whose sum is σ = 1925311483872. Its totient is φ = 570450384000.

The previous prime is 1212220111217. The next prime is 1212220111229. The reversal of 1212220111222 is 2221110222121.

It is a super-3 number, since 3×1212220111222³ (a number of 37 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1212220111222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212220111229) 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, 5256847 + ... + 5482597.

It is an arithmetic number, because the mean of its divisors is an integer number (120331967742).

Almost surely, 2^{1212220111222} is an apocalyptic number.

1212220111222 is a deficient number, since it is larger than the sum of its proper divisors (713091372650).

1212220111222 is a wasteful number, since it uses less digits than its factorization.

1212220111222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383703.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 1212220111222 its reverse (2221110222121), we get a palindrome (3433330333343).

The spelling of 1212220111222 in words is "one trillion, two hundred twelve billion, two hundred twenty million, one hundred eleven thousand, two hundred twenty-two".