1161121121050 has 96 divisors (see below), whose sum is σ = 2498126806080. Its totient is φ = 397083225600.

The previous prime is 1161121121033. The next prime is 1161121121057. The reversal of 1161121121050 is 501211211611.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (1161121121057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1026132 + ... + 1837168.

It is an arithmetic number, because the mean of its divisors is an integer number (26022154230).

Almost surely, 2^{1161121121050} is an apocalyptic number.

1161121121050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1161121121050 is an abundant number, since it is smaller than the sum of its proper divisors (1337005685030).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1161121121050 is a wasteful number, since it uses less digits than its factorization.

1161121121050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 811216 (or 811211 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 22.

Adding to 1161121121050 its reverse (501211211611), we get a palindrome (1662332332661).

The spelling of 1161121121050 in words is "one trillion, one hundred sixty-one billion, one hundred twenty-one million, one hundred twenty-one thousand, fifty".