1212142134440 has 16 divisors (see below), whose sum is σ = 2727319802580. Its totient is φ = 484856853760.

The previous prime is 1212142134433. The next prime is 1212142134457. The reversal of 1212142134440 is 444312412121.

It can be written as a sum of positive squares in 2 ways, for example, as 1197243002596 + 14899131844 = 1094186^2 + 122062^2 .

It is a super-2 number, since 2×1212142134440² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 15151776641 + ... + 15151776720.

Almost surely, 2^{1212142134440} is an apocalyptic number.

1212142134440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212142134440 is an abundant number, since it is smaller than the sum of its proper divisors (1515177668140).

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

1212142134440 is a wasteful number, since it uses less digits than its factorization.

1212142134440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30303553372 (or 30303553368 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 29.

Adding to 1212142134440 its reverse (444312412121), we get a palindrome (1656454546561).

The spelling of 1212142134440 in words is "one trillion, two hundred twelve billion, one hundred forty-two million, one hundred thirty-four thousand, four hundred forty".