1001200111 has 2 divisors, whose sum is σ = 1001200112. Its totient is φ = 1001200110.

The previous prime is 1001200099. The next prime is 1001200127. The reversal of 1001200111 is 1110021001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1001200111 - 2²¹ = 999102959 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1001200094 and 1001200103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001200171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500600055 + 500600056.

It is an arithmetic number, because the mean of its divisors is an integer number (500600056).

Almost surely, 2^1001200111 is an apocalyptic number.

1001200111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001200111 is an equidigital number, since it uses as much as digits as its factorization.

1001200111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2, while the sum is 7.

The square root of 1001200111 is about 31641.7463329697. The cubic root of 1001200111 is about 1000.3998770770.

Adding to 1001200111 its reverse (1110021001), we get a palindrome (2111221112).

The spelling of 1001200111 in words is "one billion, one million, two hundred thousand, one hundred eleven".