1212211222 has 16 divisors (see below), whose sum is σ = 1825485840. Its totient is φ = 603721728.

The previous prime is 1212211213. The next prime is 1212211241. The reversal of 1212211222 is 2221122121.

It is a happy number.

It is a super-3 number, since 3×1212211222³ (a number of 28 digits) contains 333 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 1212211196 and 1212211205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 713478 + ... + 715174.

It is an arithmetic number, because the mean of its divisors is an integer number (114092865).

Almost surely, 2^1212211222 is an apocalyptic number.

1212211222 is a deficient number, since it is larger than the sum of its proper divisors (613274618).

1212211222 is a wasteful number, since it uses less digits than its factorization.

1212211222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2895.

The product of its digits is 64, while the sum is 16.

The square root of 1212211222 is about 34816.8238356114. The cubic root of 1212211222 is about 1066.2509555627.

Adding to 1212211222 its reverse (2221122121), we get a palindrome (3433333343).

The spelling of 1212211222 in words is "one billion, two hundred twelve million, two hundred eleven thousand, two hundred twenty-two".