121333000256 has 56 divisors (see below), whose sum is σ = 259368609024. Its totient is φ = 55983075840.

The previous prime is 121333000207. The next prime is 121333000273. The reversal of 121333000256 is 652000333121.

It is a super-4 number, since 4×121333000256⁴ (a number of 45 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3010961 + ... + 3050991.

It is an arithmetic number, because the mean of its divisors is an integer number (4631582304).

Almost surely, 2^121333000256 is an apocalyptic number.

121333000256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

121333000256 is an abundant number, since it is smaller than the sum of its proper divisors (138035608768).

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

121333000256 is a wasteful number, since it uses less digits than its factorization.

121333000256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43699 (or 43689 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 26.

Adding to 121333000256 its reverse (652000333121), we get a palindrome (773333333377).

The spelling of 121333000256 in words is "one hundred twenty-one billion, three hundred thirty-three million, two hundred fifty-six", and thus it is an aban number.