121330554 has 8 divisors (see below), whose sum is σ = 242661120. Its totient is φ = 40443516.

The previous prime is 121330553. The next prime is 121330613. The reversal of 121330554 is 455033121.

It is a sphenic number, since it is the product of 3 distinct primes.

121330554 is an admirable number.

It is a super-2 number, since 2×121330554² = 29442206667893832, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121330553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10110874 + ... + 10110885.

It is an arithmetic number, because the mean of its divisors is an integer number (30332640).

Almost surely, 2^121330554 is an apocalyptic number.

121330554 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

121330554 is a wasteful number, since it uses less digits than its factorization.

121330554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20221764.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 121330554 is about 11015.0149341705. The cubic root of 121330554 is about 495.0587339755.

Adding to 121330554 its reverse (455033121), we get a palindrome (576363675).

The spelling of 121330554 in words is "one hundred twenty-one million, three hundred thirty thousand, five hundred fifty-four".