1223378011 has 2 divisors, whose sum is σ = 1223378012. Its totient is φ = 1223378010.

The previous prime is 1223378003. The next prime is 1223378029. The reversal of 1223378011 is 1108733221.

It is a weak prime.

It is an emirp because it is prime and its reverse (1108733221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1223378011 - 2³ = 1223378003 is a prime.

It is a super-2 number, since 2×1223378011² = 2993307515596632242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1223378041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611689005 + 611689006.

It is an arithmetic number, because the mean of its divisors is an integer number (611689006).

Almost surely, 2^1223378011 is an apocalyptic number.

1223378011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223378011 is an equidigital number, since it uses as much as digits as its factorization.

1223378011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 1223378011 is about 34976.8210533776. The cubic root of 1223378011 is about 1069.5150249278.

The spelling of 1223378011 in words is "one billion, two hundred twenty-three million, three hundred seventy-eight thousand, eleven".