1211014391 has 2 divisors, whose sum is σ = 1211014392. Its totient is φ = 1211014390.

The previous prime is 1211014379. The next prime is 1211014429. The reversal of 1211014391 is 1934101121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1211014391 - 2³⁰ = 137272567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211014691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605507195 + 605507196.

It is an arithmetic number, because the mean of its divisors is an integer number (605507196).

Almost surely, 2^1211014391 is an apocalyptic number.

1211014391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211014391 is an equidigital number, since it uses as much as digits as its factorization.

1211014391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 1211014391 is about 34799.6320526525. The cubic root of 1211014391 is about 1065.8999324677.

The spelling of 1211014391 in words is "one billion, two hundred eleven million, fourteen thousand, three hundred ninety-one".