1121665031 has 2 divisors, whose sum is σ = 1121665032. Its totient is φ = 1121665030.

The previous prime is 1121665021. The next prime is 1121665037. The reversal of 1121665031 is 1305661211.

It is a strong prime.

It is an emirp because it is prime and its reverse (1305661211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1121665031 - 2¹⁰ = 1121664007 is a prime.

It is a super-2 number, since 2×1121665031² = 2516264883536461922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121665037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560832515 + 560832516.

It is an arithmetic number, because the mean of its divisors is an integer number (560832516).

Almost surely, 2^1121665031 is an apocalyptic number.

1121665031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121665031 is an equidigital number, since it uses as much as digits as its factorization.

1121665031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 1121665031 is about 33491.2679813709. The cubic root of 1121665031 is about 1039.0131883980.

The spelling of 1121665031 in words is "one billion, one hundred twenty-one million, six hundred sixty-five thousand, thirty-one".