121240411 has 4 divisors (see below), whose sum is σ = 125151424. Its totient is φ = 117329400.

The previous prime is 121240409. The next prime is 121240439. The reversal of 121240411 is 114042121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 114042121 = 5449 ⋅20929.

It is a cyclic number.

It is not a de Polignac number, because 121240411 - 2¹ = 121240409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121240451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1955460 + ... + 1955521.

It is an arithmetic number, because the mean of its divisors is an integer number (31287856).

Almost surely, 2^121240411 is an apocalyptic number.

121240411 is a deficient number, since it is larger than the sum of its proper divisors (3911013).

121240411 is an equidigital number, since it uses as much as digits as its factorization.

121240411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3911012.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 121240411 is about 11010.9223501031. The cubic root of 121240411 is about 494.9361016726.

Adding to 121240411 its reverse (114042121), we get a palindrome (235282532).

The spelling of 121240411 in words is "one hundred twenty-one million, two hundred forty thousand, four hundred eleven".