1121211100212 has 72 divisors (see below), whose sum is σ = 3065181648480. Its totient is φ = 318041357760.

The previous prime is 1121211100201. The next prime is 1121211100231. The reversal of 1121211100212 is 2120011121211.

It is a happy number.

It is a super-2 number, since 2×1121211100212² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1121211100191 and 1121211100200.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6777339 + ... + 6940802.

It is an arithmetic number, because the mean of its divisors is an integer number (42571967340).

Almost surely, 2^{1121211100212} is an apocalyptic number.

1121211100212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1121211100212 is an abundant number, since it is smaller than the sum of its proper divisors (1943970548268).

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

1121211100212 is a wasteful number, since it uses less digits than its factorization.

1121211100212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13718301 (or 13718292 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1121211100212 its reverse (2120011121211), we get a palindrome (3241222221423).

The spelling of 1121211100212 in words is "one trillion, one hundred twenty-one billion, two hundred eleven million, one hundred thousand, two hundred twelve".