1212119892 has 18 divisors (see below), whose sum is σ = 3063969818. Its totient is φ = 404039952.

The previous prime is 1212119879. The next prime is 1212119899. The reversal of 1212119892 is 2989112121.

It can be written as a sum of positive squares in only one way, i.e., 1153689156 + 58430736 = 33966^2 + 7644^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 33669997 = 1212119892 / (1 + 2 + 1 + 2 + 1 + 1 + 9 + 8 + 9 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212119899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16834963 + ... + 16835034.

Almost surely, 2^1212119892 is an apocalyptic number.

1212119892 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1212119892 is an abundant number, since it is smaller than the sum of its proper divisors (1851849926).

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

1212119892 is a wasteful number, since it uses less digits than its factorization.

1212119892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33670007 (or 33670002 counting only the distinct ones).

The product of its digits is 5184, while the sum is 36.

The square root of 1212119892 is about 34815.5122323369. The cubic root of 1212119892 is about 1066.2241771862.

It can be divided in two parts, 1212 and 119892, that added together give a square (121104 = 348²).

The spelling of 1212119892 in words is "one billion, two hundred twelve million, one hundred nineteen thousand, eight hundred ninety-two".