1011331109 has 2 divisors, whose sum is σ = 1011331110. Its totient is φ = 1011331108.

The previous prime is 1011331067. The next prime is 1011331121. The reversal of 1011331109 is 9011331101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 858314209 + 153016900 = 29297^2 + 12370^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1011331109 is a prime.

It is a super-2 number, since 2×1011331109² = 2045581224062339762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1011331159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505665554 + 505665555.

It is an arithmetic number, because the mean of its divisors is an integer number (505665555).

Almost surely, 2^1011331109 is an apocalyptic number.

It is an amenable number.

1011331109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011331109 is an equidigital number, since it uses as much as digits as its factorization.

1011331109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81, while the sum is 20.

The square root of 1011331109 is about 31801.4324991815. The cubic root of 1011331109 is about 1003.7628594624.

The spelling of 1011331109 in words is "one billion, eleven million, three hundred thirty-one thousand, one hundred nine".