1011331427 has 2 divisors, whose sum is σ = 1011331428. Its totient is φ = 1011331426.

The previous prime is 1011331423. The next prime is 1011331429. The reversal of 1011331427 is 7241331101.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1011331427 - 2² = 1011331423 is a prime.

Together with 1011331429, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1011331423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505665713 + 505665714.

It is an arithmetic number, because the mean of its divisors is an integer number (505665714).

Almost surely, 2^1011331427 is an apocalyptic number.

1011331427 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011331427 is an equidigital number, since it uses as much as digits as its factorization.

1011331427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 1011331427 is about 31801.4374989559. The cubic root of 1011331427 is about 1003.7629646692.

Adding to 1011331427 its reverse (7241331101), we get a palindrome (8252662528).

The spelling of 1011331427 in words is "one billion, eleven million, three hundred thirty-one thousand, four hundred twenty-seven".