1101553440111 has 18 divisors (see below), whose sum is σ = 1690234444392. Its totient is φ = 691170784320.

The previous prime is 1101553440103. The next prime is 1101553440121. The reversal of 1101553440111 is 1110443551011.

It is a happy number.

1101553440111 is a `hidden beast` number, since 1 + 1 + 0 + 15 + 534 + 4 + 0 + 111 = 666.

It is not a de Polignac number, because 1101553440111 - 2³ = 1101553440103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101553440121) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 211753155 + ... + 211758356.

Almost surely, 2^{1101553440111} is an apocalyptic number.

1101553440111 is a deficient number, since it is larger than the sum of its proper divisors (588681004281).

1101553440111 is a wasteful number, since it uses less digits than its factorization.

1101553440111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423511551 (or 423511531 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 27.

Adding to 1101553440111 its reverse (1110443551011), we get a palindrome (2211996991122).

The spelling of 1101553440111 in words is "one trillion, one hundred one billion, five hundred fifty-three million, four hundred forty thousand, one hundred eleven".