1240201111 has 2 divisors, whose sum is σ = 1240201112. Its totient is φ = 1240201110.

The previous prime is 1240201099. The next prime is 1240201129. The reversal of 1240201111 is 1111020421.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1240201111 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1240201091 and 1240201100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1240201411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620100555 + 620100556.

It is an arithmetic number, because the mean of its divisors is an integer number (620100556).

Almost surely, 2^1240201111 is an apocalyptic number.

1240201111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240201111 is an equidigital number, since it uses as much as digits as its factorization.

1240201111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 1240201111 is about 35216.4891918544. The cubic root of 1240201111 is about 1074.3951487640.

Adding to 1240201111 its reverse (1111020421), we get a palindrome (2351221532).

The spelling of 1240201111 in words is "one billion, two hundred forty million, two hundred one thousand, one hundred eleven".