1220311101 has 16 divisors (see below), whose sum is σ = 1656230400. Its totient is φ = 798992688.

The previous prime is 1220311093. The next prime is 1220311109. The reversal of 1220311101 is 1011130221.

It is an interprime number because it is at equal distance from previous prime (1220311093) and next prime (1220311109).

It is not a de Polignac number, because 1220311101 - 2³ = 1220311093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220311109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 230850 + ... + 236076.

It is an arithmetic number, because the mean of its divisors is an integer number (103514400).

Almost surely, 2^1220311101 is an apocalyptic number.

It is an amenable number.

1220311101 is a deficient number, since it is larger than the sum of its proper divisors (435919299).

1220311101 is a wasteful number, since it uses less digits than its factorization.

1220311101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6608.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 1220311101 is about 34932.9515071372. The cubic root of 1220311101 is about 1068.6205477488.

Adding to 1220311101 its reverse (1011130221), we get a palindrome (2231441322).

The spelling of 1220311101 in words is "one billion, two hundred twenty million, three hundred eleven thousand, one hundred one".