1200111001212 has 24 divisors (see below), whose sum is σ = 2818095051856. Its totient is φ = 397488993408.

The previous prime is 1200111001171. The next prime is 1200111001213. The reversal of 1200111001212 is 2121001110021.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200111001213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 318498913 + ... + 318502680.

Almost surely, 2^{1200111001212} is an apocalyptic number.

1200111001212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1200111001212 is an abundant number, since it is smaller than the sum of its proper divisors (1617984050644).

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

1200111001212 is a wasteful number, since it uses less digits than its factorization.

1200111001212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637001757 (or 637001755 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1200111001212 its reverse (2121001110021), we get a palindrome (3321112111233).

The spelling of 1200111001212 in words is "one trillion, two hundred billion, one hundred eleven million, one thousand, two hundred twelve".