1211449521 has 8 divisors (see below), whose sum is σ = 1617090624. Its totient is φ = 806720720.

The previous prime is 1211449517. The next prime is 1211449531. The reversal of 1211449521 is 1259441121.

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 1211449521 - 2² = 1211449517 is a prime.

It is a super-3 number, since 3×1211449521³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (1211449501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 224970 + ... + 230291.

It is an arithmetic number, because the mean of its divisors is an integer number (202136328).

Almost surely, 2^1211449521 is an apocalyptic number.

It is an amenable number.

1211449521 is a deficient number, since it is larger than the sum of its proper divisors (405641103).

1211449521 is an equidigital number, since it uses as much as digits as its factorization.

1211449521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456151.

The product of its digits is 2880, while the sum is 30.

The square root of 1211449521 is about 34805.8834250763. The cubic root of 1211449521 is about 1066.0275801384.

The spelling of 1211449521 in words is "one billion, two hundred eleven million, four hundred forty-nine thousand, five hundred twenty-one".