1211112112122 has 48 divisors (see below), whose sum is σ = 2862710240832. Its totient is φ = 366993207360.

The previous prime is 1211112112121. The next prime is 1211112112157. The reversal of 1211112112122 is 2212112111121.

It is a happy number.

It is a super-2 number, since 2×1211112112122² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

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 = 1211112112095 and 1211112112104.

It is not an unprimeable number, because it can be changed into a prime (1211112112121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9569238 + ... + 9694974.

It is an arithmetic number, because the mean of its divisors is an integer number (59639796684).

Almost surely, 2^{1211112112122} is an apocalyptic number.

1211112112122 is an abundant number, since it is smaller than the sum of its proper divisors (1651598128710).

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

1211112112122 is a wasteful number, since it uses less digits than its factorization.

1211112112122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174403 (or 174400 counting only the distinct ones).

The product of its digits is 32, while the sum is 18.

Adding to 1211112112122 its reverse (2212112111121), we get a palindrome (3423224223243).

The spelling of 1211112112122 in words is "one trillion, two hundred eleven billion, one hundred twelve million, one hundred twelve thousand, one hundred twenty-two".