121242340 has 24 divisors (see below), whose sum is σ = 261491832. Its totient is φ = 47185920.

The previous prime is 121242313. The next prime is 121242367. The reversal of 121242340 is 43242121.

It is an interprime number because it is at equal distance from previous prime (121242313) and next prime (121242367).

It can be written as a sum of positive squares in 4 ways, for example, as 72046144 + 49196196 = 8488^2 + 7014^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81181 + ... + 82660.

It is an arithmetic number, because the mean of its divisors is an integer number (10895493).

Almost surely, 2^121242340 is an apocalyptic number.

121242340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121242340 is an abundant number, since it is smaller than the sum of its proper divisors (140249492).

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

121242340 is a wasteful number, since it uses less digits than its factorization.

121242340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163887 (or 163885 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 121242340 is about 11011.0099445964. The cubic root of 121242340 is about 494.9387265584.

Adding to 121242340 its reverse (43242121), we get a palindrome (164484461).

The spelling of 121242340 in words is "one hundred twenty-one million, two hundred forty-two thousand, three hundred forty".