1220033020021 has 4 divisors (see below), whose sum is σ = 1221155406592. Its totient is φ = 1218910633452.

The previous prime is 1220033019889. The next prime is 1220033020057. The reversal of 1220033020021 is 1200203300221.

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 a cyclic number.

It is not a de Polignac number, because 1220033020021 - 2²⁵ = 1219999465589 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220033019977 and 1220033020004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220033020421) 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, 561191655 + ... + 561193828.

It is an arithmetic number, because the mean of its divisors is an integer number (305288851648).

Almost surely, 2^{1220033020021} is an apocalyptic number.

It is an amenable number.

1220033020021 is a deficient number, since it is larger than the sum of its proper divisors (1122386571).

1220033020021 is a wasteful number, since it uses less digits than its factorization.

1220033020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1122386570.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 1220033020021 its reverse (1200203300221), we get a palindrome (2420236320242).

The spelling of 1220033020021 in words is "one trillion, two hundred twenty billion, thirty-three million, twenty thousand, twenty-one".