121241555 has 8 divisors (see below), whose sum is σ = 145549872. Its totient is φ = 96953248.

The previous prime is 121241543. The next prime is 121241597. The reversal of 121241555 is 555142121.

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 121241555 - 2¹⁰ = 121240531 is a prime.

It is a Duffinian number.

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, 17732 + ... + 23598.

It is an arithmetic number, because the mean of its divisors is an integer number (18193734).

Almost surely, 2^121241555 is an apocalyptic number.

121241555 is a deficient number, since it is larger than the sum of its proper divisors (24308317).

121241555 is an equidigital number, since it uses as much as digits as its factorization.

121241555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10005.

The product of its digits is 2000, while the sum is 26.

The square root of 121241555 is about 11010.9742983988. The cubic root of 121241555 is about 494.9376583734.

Adding to 121241555 its reverse (555142121), we get a palindrome (676383676).

The spelling of 121241555 in words is "one hundred twenty-one million, two hundred forty-one thousand, five hundred fifty-five".