11420400111 has 16 divisors (see below), whose sum is σ = 15511996800. Its totient is φ = 7472047968.

The previous prime is 11420400049. The next prime is 11420400119. The reversal of 11420400111 is 11100402411.

It is not a de Polignac number, because 11420400111 - 2¹¹ = 11420398063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11420400119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51541 + ... + 159678.

It is an arithmetic number, because the mean of its divisors is an integer number (969499800).

Almost surely, 2^11420400111 is an apocalyptic number.

11420400111 is a deficient number, since it is larger than the sum of its proper divisors (4091596689).

11420400111 is a wasteful number, since it uses less digits than its factorization.

11420400111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211558.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 11420400111 its reverse (11100402411), we get a palindrome (22520802522).

The spelling of 11420400111 in words is "eleven billion, four hundred twenty million, four hundred thousand, one hundred eleven".