11121155123551 has 16 divisors (see below), whose sum is σ = 12912384966048. Its totient is φ = 9466124083200.

The previous prime is 11121155123537. The next prime is 11121155123597. The reversal of 11121155123551 is 15532155112111.

It is a cyclic number.

It is not a de Polignac number, because 11121155123551 - 2⁷ = 11121155123423 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 (11121155123521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 154034940 + ... + 154107121.

It is an arithmetic number, because the mean of its divisors is an integer number (807024060378).

Almost surely, 2^{11121155123551} is an apocalyptic number.

11121155123551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11121155123551 is a deficient number, since it is larger than the sum of its proper divisors (1791229842497).

11121155123551 is a wasteful number, since it uses less digits than its factorization.

11121155123551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308142282.

The product of its digits is 7500, while the sum is 34.

The spelling of 11121155123551 in words is "eleven trillion, one hundred twenty-one billion, one hundred fifty-five million, one hundred twenty-three thousand, five hundred fifty-one".