121020340 has 96 divisors (see below), whose sum is σ = 303980544. Its totient is φ = 39605760.

The previous prime is 121020307. The next prime is 121020371. The reversal of 121020340 is 43020121.

It is a super-3 number, since 3×121020340³ (a number of 25 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 121020340.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 315789 + ... + 316171.

It is an arithmetic number, because the mean of its divisors is an integer number (3166464).

Almost surely, 2^121020340 is an apocalyptic number.

121020340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121020340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151990272).

121020340 is an abundant number, since it is smaller than the sum of its proper divisors (182960204).

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

121020340 is a wasteful number, since it uses less digits than its factorization.

121020340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497 (or 495 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 121020340 is about 11000.9245066040. The cubic root of 121020340 is about 494.6364572125.

Adding to 121020340 its reverse (43020121), we get a palindrome (164040461).

The spelling of 121020340 in words is "one hundred twenty-one million, twenty thousand, three hundred forty".