1211122122212 has 12 divisors (see below), whose sum is σ = 2121185463936. Its totient is φ = 605069132520.

The previous prime is 1211122122169. The next prime is 1211122122239. The reversal of 1211122122212 is 2122212211121.

It is a super-2 number, since 2×1211122122212² (a number of 25 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122976608 + ... + 122986455.

It is an arithmetic number, because the mean of its divisors is an integer number (176765455328).

Almost surely, 2^{1211122122212} is an apocalyptic number.

It is an amenable number.

1211122122212 is a deficient number, since it is larger than the sum of its proper divisors (910063341724).

1211122122212 is a wasteful number, since it uses less digits than its factorization.

1211122122212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245964298 (or 245964296 counting only the distinct ones).

The product of its digits is 128, while the sum is 20.

Adding to 1211122122212 its reverse (2122212211121), we get a palindrome (3333334333333).

The spelling of 1211122122212 in words is "one trillion, two hundred eleven billion, one hundred twenty-two million, one hundred twenty-two thousand, two hundred twelve".