1211211122212 has 24 divisors (see below), whose sum is σ = 2608762417856. Its totient is φ = 479160443808.

The previous prime is 1211211122201. The next prime is 1211211122227. The reversal of 1211211122212 is 2122211121121.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1211211122212.

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, 1663751178 + ... + 1663751905.

Almost surely, 2^{1211211122212} is an apocalyptic number.

It is an amenable number.

1211211122212 is an abundant number, since it is smaller than the sum of its proper divisors (1397551295644).

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

1211211122212 is a wasteful number, since it uses less digits than its factorization.

1211211122212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3327503107 (or 3327503105 counting only the distinct ones).

The product of its digits is 64, while the sum is 19.

Adding to 1211211122212 its reverse (2122211121121), we get a palindrome (3333422243333).

The spelling of 1211211122212 in words is "one trillion, two hundred eleven billion, two hundred eleven million, one hundred twenty-two thousand, two hundred twelve".