121550411 has 4 divisors (see below), whose sum is σ = 125471424. Its totient is φ = 117629400.

The previous prime is 121550399. The next prime is 121550419. The reversal of 121550411 is 114055121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 114055121 = 751 ⋅151871.

It is a cyclic number.

It is not a de Polignac number, because 121550411 - 2⁶ = 121550347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121550419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1960460 + ... + 1960521.

It is an arithmetic number, because the mean of its divisors is an integer number (31367856).

Almost surely, 2^121550411 is an apocalyptic number.

121550411 is a deficient number, since it is larger than the sum of its proper divisors (3921013).

121550411 is an equidigital number, since it uses as much as digits as its factorization.

121550411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3921012.

The product of its (nonzero) digits is 200, while the sum is 20.

The square root of 121550411 is about 11024.9902947803. The cubic root of 121550411 is about 495.3575772268.

The spelling of 121550411 in words is "one hundred twenty-one million, five hundred fifty thousand, four hundred eleven".