1121113541605 has 16 divisors (see below), whose sum is σ = 1390078761984. Its totient is φ = 867118515840.

The previous prime is 1121113541591. The next prime is 1121113541609. The reversal of 1121113541605 is 5061453111211.

It is not a de Polignac number, because 1121113541605 - 2¹⁷ = 1121113410533 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121113541609) 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, 3340849 + ... + 3661078.

It is an arithmetic number, because the mean of its divisors is an integer number (86879922624).

Almost surely, 2^{1121113541605} is an apocalyptic number.

It is an amenable number.

1121113541605 is a deficient number, since it is larger than the sum of its proper divisors (268965220379).

1121113541605 is a wasteful number, since it uses less digits than its factorization.

1121113541605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7002996.

The product of its (nonzero) digits is 3600, while the sum is 31.

Adding to 1121113541605 its reverse (5061453111211), we get a palindrome (6182566652816).

The spelling of 1121113541605 in words is "one trillion, one hundred twenty-one billion, one hundred thirteen million, five hundred forty-one thousand, six hundred five".