121240030340 has 192 divisors, whose sum is σ = 305261526528. Its totient is φ = 39868416000.

The previous prime is 121240030193. The next prime is 121240030369. The reversal of 121240030340 is 43030042121.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 28017257 + ... + 28021583.

It is an arithmetic number, because the mean of its divisors is an integer number (1589903784).

Almost surely, 2^121240030340 is an apocalyptic number.

121240030340 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 121240030340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152630763264).

121240030340 is an abundant number, since it is smaller than the sum of its proper divisors (184021496188).

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

121240030340 is a wasteful number, since it uses less digits than its factorization.

121240030340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4558 (or 4556 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 121240030340 its reverse (43030042121), we get a palindrome (164270072461).

The spelling of 121240030340 in words is "one hundred twenty-one billion, two hundred forty million, thirty thousand, three hundred forty".