1101220201 has 4 divisors (see below), whose sum is σ = 1103463504. Its totient is φ = 1098976900.

The previous prime is 1101220193. The next prime is 1101220247. The reversal of 1101220201 is 1020221011.

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: 1020221011 = 157 ⋅6498223.

It is a cyclic number.

It is not a de Polignac number, because 1101220201 - 2³ = 1101220193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1101220261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1120915 + ... + 1121896.

It is an arithmetic number, because the mean of its divisors is an integer number (275865876).

Almost surely, 2^1101220201 is an apocalyptic number.

It is an amenable number.

1101220201 is a deficient number, since it is larger than the sum of its proper divisors (2243303).

1101220201 is an equidigital number, since it uses as much as digits as its factorization.

1101220201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2243302.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1101220201 is about 33184.6380272559. The cubic root of 1101220201 is about 1032.6616681148.

Adding to 1101220201 its reverse (1020221011), we get a palindrome (2121441212).

It can be divided in two parts, 11012 and 20201, that added together give a palindrome (31213).

The spelling of 1101220201 in words is "one billion, one hundred one million, two hundred twenty thousand, two hundred one".