1100121211212 has 12 divisors (see below), whose sum is σ = 2566949492856. Its totient is φ = 366707070400.

The previous prime is 1100121211141. The next prime is 1100121211213. The reversal of 1100121211212 is 2121121210011.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 1100121211191 and 1100121211200.

It is not an unprimeable number, because it can be changed into a prime (1100121211213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45838383789 + ... + 45838383812.

It is an arithmetic number, because the mean of its divisors is an integer number (213912457738).

Almost surely, 2^{1100121211212} is an apocalyptic number.

1100121211212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1100121211212 is an abundant number, since it is smaller than the sum of its proper divisors (1466828281644).

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

1100121211212 is a wasteful number, since it uses less digits than its factorization.

1100121211212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91676767608 (or 91676767606 counting only the distinct ones).

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

Adding to 1100121211212 its reverse (2121121210011), we get a palindrome (3221242421223).

The spelling of 1100121211212 in words is "one trillion, one hundred billion, one hundred twenty-one million, two hundred eleven thousand, two hundred twelve".