121124556 has 72 divisors (see below), whose sum is σ = 354192384. Its totient is φ = 34184160.

The previous prime is 121124551. The next prime is 121124567. The reversal of 121124556 is 655421121.

It is not an unprimeable number, because it can be changed into a prime (121124551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18021 + ... + 23811.

Almost surely, 2^121124556 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121124556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177096192).

121124556 is an abundant number, since it is smaller than the sum of its proper divisors (233067828).

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

121124556 is a wasteful number, since it uses less digits than its factorization.

121124556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5891 (or 5886 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 121124556 is about 11005.6601801073. The cubic root of 121124556 is about 494.7784009635.

Adding to 121124556 its reverse (655421121), we get a palindrome (776545677).

The spelling of 121124556 in words is "one hundred twenty-one million, one hundred twenty-four thousand, five hundred fifty-six".