1201667011 has 2 divisors, whose sum is σ = 1201667012. Its totient is φ = 1201667010.

The previous prime is 1201667009. The next prime is 1201667029. The reversal of 1201667011 is 1107661021.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1201667011 - 2¹ = 1201667009 is a prime.

Together with 1201667009, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1201667081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600833505 + 600833506.

It is an arithmetic number, because the mean of its divisors is an integer number (600833506).

Almost surely, 2^1201667011 is an apocalyptic number.

1201667011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201667011 is an equidigital number, since it uses as much as digits as its factorization.

1201667011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 1201667011 is about 34665.0690320963. The cubic root of 1201667011 is about 1063.1504147007.

The spelling of 1201667011 in words is "one billion, two hundred one million, six hundred sixty-seven thousand, eleven".