1141210991 has 2 divisors, whose sum is σ = 1141210992. Its totient is φ = 1141210990.

The previous prime is 1141210979. The next prime is 1141211047. The reversal of 1141210991 is 1990121411.

It is a weak prime.

It is an emirp because it is prime and its reverse (1990121411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1141210991 - 2²² = 1137016687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1141210921) 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, 570605495 + 570605496.

It is an arithmetic number, because the mean of its divisors is an integer number (570605496).

Almost surely, 2^1141210991 is an apocalyptic number.

1141210991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1141210991 is an equidigital number, since it uses as much as digits as its factorization.

1141210991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 29.

The square root of 1141210991 is about 33781.8145012964. The cubic root of 1141210991 is about 1045.0136948672.

The spelling of 1141210991 in words is "one billion, one hundred forty-one million, two hundred ten thousand, nine hundred ninety-one".