1212111040 has 168 divisors, whose sum is σ = 3504602592. Its totient is φ = 397393920.

The previous prime is 1212111037. The next prime is 1212111049. The reversal of 1212111040 is 401112121.

1212111040 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 1212111040.

It is not an unprimeable number, because it can be changed into a prime (1212111049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 358960 + ... + 362320.

Almost surely, 2^1212111040 is an apocalyptic number.

1212111040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1212111040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1752301296).

1212111040 is an abundant number, since it is smaller than the sum of its proper divisors (2292491552).

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

1212111040 is a wasteful number, since it uses less digits than its factorization.

1212111040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3415 (or 3398 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 1212111040 is about 34815.3851048642. The cubic root of 1212111040 is about 1066.2215816676.

Adding to 1212111040 its reverse (401112121), we get a palindrome (1613223161).

The spelling of 1212111040 in words is "one billion, two hundred twelve million, one hundred eleven thousand, forty".