121343402120 has 16 divisors (see below), whose sum is σ = 273022654860. Its totient is φ = 48537360832.

The previous prime is 121343402107. The next prime is 121343402129. The reversal of 121343402120 is 21204343121.

It can be written as a sum of positive squares in 2 ways, for example, as 119263859716 + 2079542404 = 345346^2 + 45602^2 .

It is not an unprimeable number, because it can be changed into a prime (121343402129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1516792487 + ... + 1516792566.

Almost surely, 2^121343402120 is an apocalyptic number.

121343402120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121343402120 is an abundant number, since it is smaller than the sum of its proper divisors (151679252740).

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

121343402120 is a wasteful number, since it uses less digits than its factorization.

121343402120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3033585064 (or 3033585060 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 121343402120 its reverse (21204343121), we get a palindrome (142547745241).

The spelling of 121343402120 in words is "one hundred twenty-one billion, three hundred forty-three million, four hundred two thousand, one hundred twenty".