121434040 has 128 divisors (see below), whose sum is σ = 341631360. Its totient is φ = 37822464.

The previous prime is 121434031. The next prime is 121434091. The reversal of 121434040 is 40434121.

It is a junction number, because it is equal to n+sod(n) for n = 121433999 and 121434017.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 265492 + ... + 265948.

It is an arithmetic number, because the mean of its divisors is an integer number (2668995).

Almost surely, 2^121434040 is an apocalyptic number.

121434040 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 121434040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170815680).

121434040 is an abundant number, since it is smaller than the sum of its proper divisors (220197320).

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

121434040 is a wasteful number, since it uses less digits than its factorization.

121434040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561 (or 557 counting only the distinct ones).

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

The square root of 121434040 is about 11019.7114299786. The cubic root of 121434040 is about 495.1994434883.

Adding to 121434040 its reverse (40434121), we get a palindrome (161868161).

The spelling of 121434040 in words is "one hundred twenty-one million, four hundred thirty-four thousand, forty".