121400340 has 48 divisors (see below), whose sum is σ = 350891520. Its totient is φ = 31328640.

The previous prime is 121400339. The next prime is 121400341. The reversal of 121400340 is 43004121.

It is an interprime number because it is at equal distance from previous prime (121400339) and next prime (121400341).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121400341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30775 + ... + 34494.

It is an arithmetic number, because the mean of its divisors is an integer number (7310240).

Almost surely, 2^121400340 is an apocalyptic number.

121400340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121400340 is an abundant number, since it is smaller than the sum of its proper divisors (229491180).

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

121400340 is a wasteful number, since it uses less digits than its factorization.

121400340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65312 (or 65310 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 121400340 is about 11018.1822457246. The cubic root of 121400340 is about 495.1536305097.

Adding to 121400340 its reverse (43004121), we get a palindrome (164404461).

The spelling of 121400340 in words is "one hundred twenty-one million, four hundred thousand, three hundred forty".