12123121160 has 32 divisors (see below), whose sum is σ = 27299545560. Its totient is φ = 4845244416.

The previous prime is 12123121159. The next prime is 12123121163. The reversal of 12123121160 is 6112132121.

It can be written as a sum of positive squares in 4 ways, for example, as 11789182084 + 333939076 = 108578^2 + 18274^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (12123121163) 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, 75839 + ... + 173198.

Almost surely, 2^12123121160 is an apocalyptic number.

12123121160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12123121160 is an abundant number, since it is smaller than the sum of its proper divisors (15176424400).

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

12123121160 is a wasteful number, since it uses less digits than its factorization.

12123121160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250265 (or 250261 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 12123121160 its reverse (6112132121), we get a palindrome (18235253281).

The spelling of 12123121160 in words is "twelve billion, one hundred twenty-three million, one hundred twenty-one thousand, one hundred sixty".