1191001010 has 16 divisors (see below), whose sum is σ = 2144995776. Its totient is φ = 476135088.

The previous prime is 1191000961. The next prime is 1191001013. The reversal of 1191001010 is 101001911.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1191001013) 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 in 7 ways as a sum of consecutive naturals, for example, 13772 + ... + 50711.

It is an arithmetic number, because the mean of its divisors is an integer number (134062236).

Almost surely, 2^1191001010 is an apocalyptic number.

1191001010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1191001010 is a deficient number, since it is larger than the sum of its proper divisors (953994766).

1191001010 is a wasteful number, since it uses less digits than its factorization.

1191001010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66337.

The product of its (nonzero) digits is 9, while the sum is 14.

The square root of 1191001010 is about 34510.8824865433. The cubic root of 1191001010 is about 1059.9955529658.

Adding to 1191001010 its reverse (101001911), we get a palindrome (1292002921).

The spelling of 1191001010 in words is "one billion, one hundred ninety-one million, one thousand, ten".