1220002020011 has 4 divisors (see below), whose sum is σ = 1220948493000. Its totient is φ = 1219055547024.

The previous prime is 1220002019993. The next prime is 1220002020037. The reversal of 1220002020011 is 1100202000221.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220002020011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220002019974 and 1220002020001.

It is not an unprimeable number, because it can be changed into a prime (1220002020091) 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, 473234561 + ... + 473237138.

It is an arithmetic number, because the mean of its divisors is an integer number (305237123250).

Almost surely, 2^{1220002020011} is an apocalyptic number.

1220002020011 is a deficient number, since it is larger than the sum of its proper divisors (946472989).

1220002020011 is an equidigital number, since it uses as much as digits as its factorization.

1220002020011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 946472988.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1220002020011 its reverse (1100202000221), we get a palindrome (2320204020232).

The spelling of 1220002020011 in words is "one trillion, two hundred twenty billion, two million, twenty thousand, eleven".