1212011903 has 2 divisors, whose sum is σ = 1212011904. Its totient is φ = 1212011902.

The previous prime is 1212011893. The next prime is 1212011909. The reversal of 1212011903 is 3091102121.

It is a strong prime.

It is an emirp because it is prime and its reverse (3091102121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1212011903 - 2⁶ = 1212011839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212011909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606005951 + 606005952.

It is an arithmetic number, because the mean of its divisors is an integer number (606005952).

Almost surely, 2^1212011903 is an apocalyptic number.

1212011903 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212011903 is an equidigital number, since it uses as much as digits as its factorization.

1212011903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 1212011903 is about 34813.9613230095. The cubic root of 1212011903 is about 1066.1925125787.

The spelling of 1212011903 in words is "one billion, two hundred twelve million, eleven thousand, nine hundred three".