121215441 has 32 divisors (see below), whose sum is σ = 171601920. Its totient is φ = 76019904.

The previous prime is 121215433. The next prime is 121215463. The reversal of 121215441 is 144512121.

It is not a de Polignac number, because 121215441 - 2³ = 121215433 is a prime.

It is a super-3 number, since 3×121215441³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (121215431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 543456 + ... + 543678.

It is an arithmetic number, because the mean of its divisors is an integer number (5362560).

Almost surely, 2^121215441 is an apocalyptic number.

It is an amenable number.

121215441 is a deficient number, since it is larger than the sum of its proper divisors (50386479).

121215441 is a wasteful number, since it uses less digits than its factorization.

121215441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405.

The product of its digits is 320, while the sum is 21.

The square root of 121215441 is about 11009.7884175855. The cubic root of 121215441 is about 494.9021212451.

Adding to 121215441 its reverse (144512121), we get a palindrome (265727562).

It can be divided in two parts, 1212 and 15441, that added together give a triangular number (16653 = T₁₈₂).

The spelling of 121215441 in words is "one hundred twenty-one million, two hundred fifteen thousand, four hundred forty-one".