121143660 has 144 divisors (see below), whose sum is σ = 384362496. Its totient is φ = 28272000.

The previous prime is 121143647. The next prime is 121143689. The reversal of 121143660 is 66341121.

It is a super-3 number, since 3×121143660³ (a number of 25 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121143660.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 634165 + ... + 634355.

It is an arithmetic number, because the mean of its divisors is an integer number (2669184).

Almost surely, 2^121143660 is an apocalyptic number.

121143660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121143660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (192181248).

121143660 is an abundant number, since it is smaller than the sum of its proper divisors (263218836).

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

121143660 is a wasteful number, since it uses less digits than its factorization.

121143660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276 (or 243 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 121143660 is about 11006.5280629270. The cubic root of 121143660 is about 494.8044120659.

Adding to 121143660 its reverse (66341121), we get a palindrome (187484781).

The spelling of 121143660 in words is "one hundred twenty-one million, one hundred forty-three thousand, six hundred sixty".