121143231012 has 12 divisors (see below), whose sum is σ = 282667539056. Its totient is φ = 40381077000.

The previous prime is 121143231007. The next prime is 121143231029. The reversal of 121143231012 is 210132341121.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-3 number, since 3×121143231012³ (a number of 34 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 121143231012.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5047634614 + ... + 5047634637.

Almost surely, 2^121143231012 is an apocalyptic number.

121143231012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121143231012 is an abundant number, since it is smaller than the sum of its proper divisors (161524308044).

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

121143231012 is a wasteful number, since it uses less digits than its factorization.

121143231012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10095269258 (or 10095269256 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 121143231012 its reverse (210132341121), we get a palindrome (331275572133).

The spelling of 121143231012 in words is "one hundred twenty-one billion, one hundred forty-three million, two hundred thirty-one thousand, twelve".