11001105551 has 16 divisors (see below), whose sum is σ = 11571821568. Its totient is φ = 10438428000.

The previous prime is 11001105541. The next prime is 11001105587. The reversal of 11001105551 is 15550110011.

It is a cyclic number.

It is not a de Polignac number, because 11001105551 - 2⁶ = 11001105487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11001105541) 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, 1534826 + ... + 1541976.

It is an arithmetic number, because the mean of its divisors is an integer number (723238848).

Almost surely, 2^11001105551 is an apocalyptic number.

11001105551 is a deficient number, since it is larger than the sum of its proper divisors (570716017).

11001105551 is a wasteful number, since it uses less digits than its factorization.

11001105551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7702.

The product of its (nonzero) digits is 125, while the sum is 20.

Adding to 11001105551 its reverse (15550110011), we get a palindrome (26551215562).

The spelling of 11001105551 in words is "eleven billion, one million, one hundred five thousand, five hundred fifty-one".