121342140 has 36 divisors (see below), whose sum is σ = 368071704. Its totient is φ = 32357856.

The previous prime is 121342139. The next prime is 121342157. The reversal of 121342140 is 41243121.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 336882 + ... + 337241.

It is an arithmetic number, because the mean of its divisors is an integer number (10224214).

Almost surely, 2^121342140 is an apocalyptic number.

121342140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121342140 is an abundant number, since it is smaller than the sum of its proper divisors (246729564).

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

121342140 is a wasteful number, since it uses less digits than its factorization.

121342140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 674138 (or 674133 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 121342140 is about 11015.5408401040. The cubic root of 121342140 is about 495.0744913912.

Adding to 121342140 its reverse (41243121), we get a palindrome (162585261).

The spelling of 121342140 in words is "one hundred twenty-one million, three hundred forty-two thousand, one hundred forty".