1101211111212 has 12 divisors (see below), whose sum is σ = 2569492592856. Its totient is φ = 367070370400.

The previous prime is 1101211111193. The next prime is 1101211111219. The reversal of 1101211111212 is 2121111121011.

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

It is a super-2 number, since 2×1101211111212² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1101211111191 and 1101211111200.

It is not an unprimeable number, because it can be changed into a prime (1101211111219) 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, 45883796289 + ... + 45883796312.

It is an arithmetic number, because the mean of its divisors is an integer number (214124382738).

Almost surely, 2^{1101211111212} is an apocalyptic number.

1101211111212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1101211111212 is an abundant number, since it is smaller than the sum of its proper divisors (1468281481644).

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

1101211111212 is a wasteful number, since it uses less digits than its factorization.

1101211111212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91767592608 (or 91767592606 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 1101211111212 its reverse (2121111121011), we get a palindrome (3222322232223).

The spelling of 1101211111212 in words is "one trillion, one hundred one billion, two hundred eleven million, one hundred eleven thousand, two hundred twelve".