1212134443 has 16 divisors (see below), whose sum is σ = 1315512576. Its totient is φ = 1110241440.

The previous prime is 1212134437. The next prime is 1212134447. The reversal of 1212134443 is 3444312121.

It is a cyclic number.

It is not a de Polignac number, because 1212134443 - 2⁵ = 1212134411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212134447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1774380 + ... + 1775062.

It is an arithmetic number, because the mean of its divisors is an integer number (82219536).

Almost surely, 2^1212134443 is an apocalyptic number.

1212134443 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1212134443 is a deficient number, since it is larger than the sum of its proper divisors (103378133).

1212134443 is a wasteful number, since it uses less digits than its factorization.

1212134443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1554.

The product of its digits is 2304, while the sum is 25.

The square root of 1212134443 is about 34815.7212046512. The cubic root of 1212134443 is about 1066.2284436965.

Adding to 1212134443 its reverse (3444312121), we get a palindrome (4656446564).

It can be divided in two parts, 12121 and 34443, that added together give a palindrome (46564).

The spelling of 1212134443 in words is "one billion, two hundred twelve million, one hundred thirty-four thousand, four hundred forty-three".