1220211101 has 8 divisors (see below), whose sum is σ = 1228538304. Its totient is φ = 1211908320.

The previous prime is 1220211077. The next prime is 1220211151. The reversal of 1220211101 is 1011120221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220211101 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 (1220211151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100385 + ... + 111881.

It is an arithmetic number, because the mean of its divisors is an integer number (153567288).

Almost surely, 2^1220211101 is an apocalyptic number.

It is an amenable number.

1220211101 is a deficient number, since it is larger than the sum of its proper divisors (8327203).

1220211101 is a wasteful number, since it uses less digits than its factorization.

1220211101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12211.

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

The square root of 1220211101 is about 34931.5201644589. The cubic root of 1220211101 is about 1068.5913571121.

Adding to 1220211101 its reverse (1011120221), we get a palindrome (2231331322).

The spelling of 1220211101 in words is "one billion, two hundred twenty million, two hundred eleven thousand, one hundred one".