20033110221221 has 4 divisors (see below), whose sum is σ = 20904115013472. Its totient is φ = 19162105428972.

The previous prime is 20033110221197. The next prime is 20033110221239. The reversal of 20033110221221 is 12212201133002.

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 20033110221221 - 2²² = 20033106026917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20033110221193 and 20033110221202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20033110221121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 435502396091 + ... + 435502396136.

It is an arithmetic number, because the mean of its divisors is an integer number (5226028753368).

Almost surely, 2^{20033110221221} is an apocalyptic number.

It is an amenable number.

20033110221221 is a deficient number, since it is larger than the sum of its proper divisors (871004792251).

20033110221221 is an equidigital number, since it uses as much as digits as its factorization.

20033110221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 871004792250.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 20033110221221 its reverse (12212201133002), we get a palindrome (32245311354223).

The spelling of 20033110221221 in words is "twenty trillion, thirty-three billion, one hundred ten million, two hundred twenty-one thousand, two hundred twenty-one".