1212011121212 has 36 divisors (see below), whose sum is σ = 2284858782864. Its totient is φ = 562324922880.

The previous prime is 1212011121199. The next prime is 1212011121221. The reversal of 1212011121212 is 2121211102121.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 7301393 + ... + 7465544.

It is an arithmetic number, because the mean of its divisors is an integer number (63468299524).

Almost surely, 2^{1212011121212} is an apocalyptic number.

It is an amenable number.

1212011121212 is a deficient number, since it is larger than the sum of its proper divisors (1072847661652).

1212011121212 is a wasteful number, since it uses less digits than its factorization.

1212011121212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14767046 (or 14767027 counting only the distinct ones).

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

Adding to 1212011121212 its reverse (2121211102121), we get a palindrome (3333222223333).

The spelling of 1212011121212 in words is "one trillion, two hundred twelve billion, eleven million, one hundred twenty-one thousand, two hundred twelve".