1212123434 has 8 divisors (see below), whose sum is σ = 1818334980. Its totient is φ = 606011776.

The previous prime is 1212123389. The next prime is 1212123439. The reversal of 1212123434 is 4343212121.

1212123434 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It can be written as a sum of positive squares in 2 ways, for example, as 1196952409 + 15171025 = 34597^2 + 3895^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (1212123439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27002 + ... + 56154.

Almost surely, 2^1212123434 is an apocalyptic number.

1212123434 is a deficient number, since it is larger than the sum of its proper divisors (606211546).

1212123434 is a wasteful number, since it uses less digits than its factorization.

1212123434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49944.

The product of its digits is 1152, while the sum is 23.

The square root of 1212123434 is about 34815.5631004297. The cubic root of 1212123434 is about 1066.2252157420.

Adding to 1212123434 its reverse (4343212121), we get a palindrome (5555335555).

The spelling of 1212123434 in words is "one billion, two hundred twelve million, one hundred twenty-three thousand, four hundred thirty-four".