1011111121212 has 24 divisors (see below), whose sum is σ = 2359364856912. Its totient is φ = 337021958400.

The previous prime is 1011111121187. The next prime is 1011111121253. The reversal of 1011111121212 is 2121211111101.

It is a junction number, because it is equal to n+sod(n) for n = 1011111121191 and 1011111121200.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1604239 + ... + 2143782.

It is an arithmetic number, because the mean of its divisors is an integer number (98306869038).

Almost surely, 2^{1011111121212} is an apocalyptic number.

1011111121212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1011111121212 is an abundant number, since it is smaller than the sum of its proper divisors (1348253735700).

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

1011111121212 is a wasteful number, since it uses less digits than its factorization.

1011111121212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3770509 (or 3770507 counting only the distinct ones).

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

Adding to 1011111121212 its reverse (2121211111101), we get a palindrome (3132322232313).

The spelling of 1011111121212 in words is "one trillion, eleven billion, one hundred eleven million, one hundred twenty-one thousand, two hundred twelve".