1001111121212 has 24 divisors (see below), whose sum is σ = 1755503510880. Its totient is φ = 499539683520.

The previous prime is 1001111121169. The next prime is 1001111121223. The reversal of 1001111121212 is 2121211111001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3939089 + ... + 4185527.

It is an arithmetic number, because the mean of its divisors is an integer number (73145979620).

Almost surely, 2^{1001111121212} is an apocalyptic number.

It is an amenable number.

1001111121212 is a deficient number, since it is larger than the sum of its proper divisors (754392389668).

1001111121212 is a wasteful number, since it uses less digits than its factorization.

1001111121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248501 (or 248499 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1001111121212 its reverse (2121211111001), we get a palindrome (3122322232213).

The spelling of 1001111121212 in words is "one trillion, one billion, one hundred eleven million, one hundred twenty-one thousand, two hundred twelve".