1101212121212 has 96 divisors (see below), whose sum is σ = 2280337059840. Its totient is φ = 455347008000.

The previous prime is 1101212121211. The next prime is 1101212121227. The reversal of 1101212121212 is 2121212121011.

1101212121212 is a modest number, since divided by 12121212 gives 11012 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101212121211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 547593287 + ... + 547595297.

It is an arithmetic number, because the mean of its divisors is an integer number (23753511040).

Almost surely, 2^{1101212121212} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1101212121212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1140168529920).

1101212121212 is an abundant number, since it is smaller than the sum of its proper divisors (1179124938628).

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

1101212121212 is a wasteful number, since it uses less digits than its factorization.

1101212121212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3643 (or 3641 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 1101212121212 its reverse (2121212121011), we get a palindrome (3222424242223).

The spelling of 1101212121212 in words is "one trillion, one hundred one billion, two hundred twelve million, one hundred twenty-one thousand, two hundred twelve".