1101201221 has 4 divisors (see below), whose sum is σ = 1159159200. Its totient is φ = 1043243244.

The previous prime is 1101201203. The next prime is 1101201263. The reversal of 1101201221 is 1221021011.

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.

It is a cyclic number.

It is not a de Polignac number, because 1101201221 - 2²² = 1097006917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101201281) 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, 28978961 + ... + 28978998.

It is an arithmetic number, because the mean of its divisors is an integer number (289789800).

Almost surely, 2^1101201221 is an apocalyptic number.

It is an amenable number.

1101201221 is a deficient number, since it is larger than the sum of its proper divisors (57957979).

1101201221 is an equidigital number, since it uses as much as digits as its factorization.

1101201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57957978.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1101201221 is about 33184.3520503264. The cubic root of 1101201221 is about 1032.6557352926.

Adding to 1101201221 its reverse (1221021011), we get a palindrome (2322222232).

The spelling of 1101201221 in words is "one billion, one hundred one million, two hundred one thousand, two hundred twenty-one".