1220011213 has 4 divisors (see below), whose sum is σ = 1221590268. Its totient is φ = 1218432160.

The previous prime is 1220011193. The next prime is 1220011267. The reversal of 1220011213 is 3121100221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 170380809 + 1049630404 = 13053^2 + 32398^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220011213 - 2²⁹ = 683140301 is a prime.

It is a super-3 number, since 3×1220011213³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220011193 and 1220011202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220011283) 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 3 ways as a sum of consecutive naturals, for example, 788368 + ... + 789913.

It is an arithmetic number, because the mean of its divisors is an integer number (305397567).

Almost surely, 2^1220011213 is an apocalyptic number.

It is an amenable number.

1220011213 is a deficient number, since it is larger than the sum of its proper divisors (1579055).

1220011213 is an equidigital number, since it uses as much as digits as its factorization.

1220011213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1579054.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1220011213 is about 34928.6589064052. The cubic root of 1220011213 is about 1068.5330037519.

Adding to 1220011213 its reverse (3121100221), we get a palindrome (4341111434).

The spelling of 1220011213 in words is "one billion, two hundred twenty million, eleven thousand, two hundred thirteen".