11161121500 has 24 divisors (see below), whose sum is σ = 24375890448. Its totient is φ = 4464448400.

The previous prime is 11161121479. The next prime is 11161121507. The reversal of 11161121500 is 512116111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11161121507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11160622 + ... + 11161621.

It is an arithmetic number, because the mean of its divisors is an integer number (1015662102).

Almost surely, 2^11161121500 is an apocalyptic number.

11161121500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11161121500 is an abundant number, since it is smaller than the sum of its proper divisors (13214768948).

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

11161121500 is a wasteful number, since it uses less digits than its factorization.

11161121500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22322262 (or 22322250 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 19.

Adding to 11161121500 its reverse (512116111), we get a palindrome (11673237611).

The spelling of 11161121500 in words is "eleven billion, one hundred sixty-one million, one hundred twenty-one thousand, five hundred".