1101241221 has 4 divisors (see below), whose sum is σ = 1468321632. Its totient is φ = 734160812.

The previous prime is 1101241187. The next prime is 1101241237. The reversal of 1101241221 is 1221421011.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1221421011 = 3 ⋅407140337.

It is a cyclic number.

It is not a de Polignac number, because 1101241221 - 2⁷ = 1101241093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1101241221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101241321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 183540201 + ... + 183540206.

It is an arithmetic number, because the mean of its divisors is an integer number (367080408).

Almost surely, 2^1101241221 is an apocalyptic number.

It is an amenable number.

1101241221 is a deficient number, since it is larger than the sum of its proper divisors (367080411).

1101241221 is an equidigital number, since it uses as much as digits as its factorization.

1101241221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367080410.

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 1101241221 is about 33184.9547385558. The cubic root of 1101241221 is about 1032.6682385265.

Adding to 1101241221 its reverse (1221421011), we get a palindrome (2322662232).

The spelling of 1101241221 in words is "one billion, one hundred one million, two hundred forty-one thousand, two hundred twenty-one".