1220242021113 has 4 divisors (see below), whose sum is σ = 1626989361488. Its totient is φ = 813494680740.

The previous prime is 1220242021109. The next prime is 1220242021177. The reversal of 1220242021113 is 3111202420221.

It is a happy number.

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 not a de Polignac number, because 1220242021113 - 2² = 1220242021109 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1220242021113.

It is not an unprimeable number, because it can be changed into a prime (1220242021913) 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, 203373670183 + ... + 203373670188.

It is an arithmetic number, because the mean of its divisors is an integer number (406747340372).

Almost surely, 2^{1220242021113} is an apocalyptic number.

It is an amenable number.

1220242021113 is a deficient number, since it is larger than the sum of its proper divisors (406747340375).

1220242021113 is an equidigital number, since it uses as much as digits as its factorization.

1220242021113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406747340374.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 1220242021113 its reverse (3111202420221), we get a palindrome (4331444441334).

The spelling of 1220242021113 in words is "one trillion, two hundred twenty billion, two hundred forty-two million, twenty-one thousand, one hundred thirteen".