1321150111 has 2 divisors, whose sum is σ = 1321150112. Its totient is φ = 1321150110.

The previous prime is 1321150099. The next prime is 1321150147. The reversal of 1321150111 is 1110511231.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1321150111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321157111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660575055 + 660575056.

It is an arithmetic number, because the mean of its divisors is an integer number (660575056).

Almost surely, 2^1321150111 is an apocalyptic number.

1321150111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321150111 is an equidigital number, since it uses as much as digits as its factorization.

1321150111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30, while the sum is 16.

The square root of 1321150111 is about 36347.6286846886. The cubic root of 1321150111 is about 1097.2798107466.

Adding to 1321150111 its reverse (1110511231), we get a palindrome (2431661342).

The spelling of 1321150111 in words is "one billion, three hundred twenty-one million, one hundred fifty thousand, one hundred eleven".