1211550103 has 2 divisors, whose sum is σ = 1211550104. Its totient is φ = 1211550102.

The previous prime is 1211550077. The next prime is 1211550133. The reversal of 1211550103 is 3010551121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1211550103 - 2¹³ = 1211541911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211550133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605775051 + 605775052.

It is an arithmetic number, because the mean of its divisors is an integer number (605775052).

Almost surely, 2^1211550103 is an apocalyptic number.

1211550103 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211550103 is an equidigital number, since it uses as much as digits as its factorization.

1211550103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 150, while the sum is 19.

The square root of 1211550103 is about 34807.3282944842. The cubic root of 1211550103 is about 1066.0570820469.

The spelling of 1211550103 in words is "one billion, two hundred eleven million, five hundred fifty thousand, one hundred three".