1212023403 has 6 divisors (see below), whose sum is σ = 1750700484. Its totient is φ = 808015596.

The previous prime is 1212023389. The next prime is 1212023411. The reversal of 1212023403 is 3043202121.

1212023403 is a `hidden beast` number, since 121 + 202 + 340 + 3 = 666.

It is not a de Polignac number, because 1212023403 - 2⁶ = 1212023339 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1212023473) 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 5 ways as a sum of consecutive naturals, for example, 67334625 + ... + 67334642.

It is an arithmetic number, because the mean of its divisors is an integer number (291783414).

Almost surely, 2^1212023403 is an apocalyptic number.

1212023403 is a deficient number, since it is larger than the sum of its proper divisors (538677081).

1212023403 is a wasteful number, since it uses less digits than its factorization.

1212023403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134669273 (or 134669270 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1212023403 is about 34814.1264862412. The cubic root of 1212023403 is about 1066.1958847059.

Adding to 1212023403 its reverse (3043202121), we get a palindrome (4255225524).

The spelling of 1212023403 in words is "one billion, two hundred twelve million, twenty-three thousand, four hundred three".