1121550551555 has 32 divisors (see below), whose sum is σ = 1540675737600. Its totient is φ = 767789269632.

The previous prime is 1121550551549. The next prime is 1121550551587. The reversal of 1121550551555 is 5551550551211.

It is not a de Polignac number, because 1121550551555 - 2¹⁶ = 1121550486019 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 167317334 + ... + 167324036.

It is an arithmetic number, because the mean of its divisors is an integer number (48146116800).

Almost surely, 2^{1121550551555} is an apocalyptic number.

1121550551555 is a deficient number, since it is larger than the sum of its proper divisors (419125186045).

1121550551555 is an equidigital number, since it uses as much as digits as its factorization.

1121550551555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13923.

The product of its (nonzero) digits is 156250, while the sum is 41.

The spelling of 1121550551555 in words is "one trillion, one hundred twenty-one billion, five hundred fifty million, five hundred fifty-one thousand, five hundred fifty-five".