121111430340 has 24 divisors (see below), whose sum is σ = 339112005120. Its totient is φ = 32296381408.

The previous prime is 121111430299. The next prime is 121111430347. The reversal of 121111430340 is 43034111121.

It is not an unprimeable number, because it can be changed into a prime (121111430347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1009261860 + ... + 1009261979.

It is an arithmetic number, because the mean of its divisors is an integer number (14129666880).

Almost surely, 2^121111430340 is an apocalyptic number.

121111430340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121111430340 is an abundant number, since it is smaller than the sum of its proper divisors (218000574780).

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

121111430340 is a wasteful number, since it uses less digits than its factorization.

121111430340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2018523851 (or 2018523849 counting only the distinct ones).

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

Adding to 121111430340 its reverse (43034111121), we get a palindrome (164145541461).

It can be divided in two parts, 12111 and 1430340, that added together give a triangular number (1442451 = T₁₆₉₈).

The spelling of 121111430340 in words is "one hundred twenty-one billion, one hundred eleven million, four hundred thirty thousand, three hundred forty".