121221143312 has 40 divisors (see below), whose sum is σ = 238003237056. Its totient is φ = 59805207936.

The previous prime is 121221143243. The next prime is 121221143321. The reversal of 121221143312 is 213341122121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 323723 + ... + 589269.

Almost surely, 2^121221143312 is an apocalyptic number.

It is an amenable number.

121221143312 is a deficient number, since it is larger than the sum of its proper divisors (116782093744).

121221143312 is a wasteful number, since it uses less digits than its factorization.

121221143312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265935 (or 265929 counting only the distinct ones).

The product of its digits is 576, while the sum is 23.

Adding to 121221143312 its reverse (213341122121), we get a palindrome (334562265433).

The spelling of 121221143312 in words is "one hundred twenty-one billion, two hundred twenty-one million, one hundred forty-three thousand, three hundred twelve".