121054561 has 8 divisors (see below), whose sum is σ = 124240064. Its totient is φ = 117907920.

The previous prime is 121054537. The next prime is 121054601. The reversal of 121054561 is 165450121.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 121054561 - 2⁹ = 121054049 is a prime.

It is a super-3 number, since 3×121054561³ (a number of 25 digits) contains 333 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121054511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3351 + ... + 15916.

It is an arithmetic number, because the mean of its divisors is an integer number (15530008).

Almost surely, 2^121054561 is an apocalyptic number.

It is an amenable number.

121054561 is a deficient number, since it is larger than the sum of its proper divisors (3185503).

121054561 is a wasteful number, since it uses less digits than its factorization.

121054561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19431.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 121054561 is about 11002.4797659437. The cubic root of 121054561 is about 494.6830757092.

The spelling of 121054561 in words is "one hundred twenty-one million, fifty-four thousand, five hundred sixty-one".