121312734 has 32 divisors (see below), whose sum is σ = 255799296. Its totient is φ = 38297760.

The previous prime is 121312733. The next prime is 121312747. The reversal of 121312734 is 437213121.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121312733) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1804 + ... + 15680.

It is an arithmetic number, because the mean of its divisors is an integer number (7993728).

Almost surely, 2^121312734 is an apocalyptic number.

121312734 is an abundant number, since it is smaller than the sum of its proper divisors (134486562).

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

121312734 is a wasteful number, since it uses less digits than its factorization.

121312734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13960.

The product of its digits is 1008, while the sum is 24.

The square root of 121312734 is about 11014.2060086054. The cubic root of 121312734 is about 495.0344961165.

Adding to 121312734 its reverse (437213121), we get a palindrome (558525855).

The spelling of 121312734 in words is "one hundred twenty-one million, three hundred twelve thousand, seven hundred thirty-four".