1011332891 has 2 divisors, whose sum is σ = 1011332892. Its totient is φ = 1011332890.

The previous prime is 1011332879. The next prime is 1011332911. The reversal of 1011332891 is 1982331101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1011332891 - 2¹⁸ = 1011070747 is a prime.

It is not a weakly prime, because it can be changed into another prime (1011332191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505666445 + 505666446.

It is an arithmetic number, because the mean of its divisors is an integer number (505666446).

Almost surely, 2^1011332891 is an apocalyptic number.

1011332891 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011332891 is an equidigital number, since it uses as much as digits as its factorization.

1011332891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 1011332891 is about 31801.4605167750. The cubic root of 1011332891 is about 1003.7634490169.

Adding to 1011332891 its reverse (1982331101), we get a palindrome (2993663992).

The spelling of 1011332891 in words is "one billion, eleven million, three hundred thirty-two thousand, eight hundred ninety-one".