1212110440 has 16 divisors (see below), whose sum is σ = 2727248580. Its totient is φ = 484844160.

The previous prime is 1212110437. The next prime is 1212110461. The reversal of 1212110440 is 440112121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1192873444 + 19236996 = 34538^2 + 4386^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15151341 + ... + 15151420.

Almost surely, 2^1212110440 is an apocalyptic number.

1212110440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212110440 is an abundant number, since it is smaller than the sum of its proper divisors (1515138140).

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

1212110440 is a wasteful number, since it uses less digits than its factorization.

1212110440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30302772 (or 30302768 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 1212110440 is about 34815.3764879830. The cubic root of 1212110440 is about 1066.2214057395.

Adding to 1212110440 its reverse (440112121), we get a palindrome (1652222561).

The spelling of 1212110440 in words is "one billion, two hundred twelve million, one hundred ten thousand, four hundred forty".