121153144144 has 20 divisors (see below), whose sum is σ = 234765062740. Its totient is φ = 60568611840.

The previous prime is 121153144141. The next prime is 121153144157. The reversal of 121153144144 is 441441351121.

It can be written as a sum of positive squares in 2 ways, for example, as 107854441744 + 13298702400 = 328412^2 + 115320^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121153144141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 370977 + ... + 616384.

It is an arithmetic number, because the mean of its divisors is an integer number (11738253137).

Almost surely, 2^121153144144 is an apocalyptic number.

It is an amenable number.

121153144144 is a deficient number, since it is larger than the sum of its proper divisors (113611918596).

121153144144 is an equidigital number, since it uses as much as digits as its factorization.

121153144144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 995038 (or 995032 counting only the distinct ones).

The product of its digits is 7680, while the sum is 31.

Adding to 121153144144 its reverse (441441351121), we get a palindrome (562594495265).

The spelling of 121153144144 in words is "one hundred twenty-one billion, one hundred fifty-three million, one hundred forty-four thousand, one hundred forty-four".