20033122221 has 72 divisors (see below), whose sum is σ = 34864038144. Its totient is φ = 11045321280.

The previous prime is 20033122211. The next prime is 20033122223. The reversal of 20033122221 is 12222133002.

It is not a de Polignac number, because 20033122221 - 2¹⁷ = 20032991149 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20033122194 and 20033122203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20033122223) 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 71 ways as a sum of consecutive naturals, for example, 1464811 + ... + 1478423.

It is an arithmetic number, because the mean of its divisors is an integer number (484222752).

Almost surely, 2^20033122221 is an apocalyptic number.

20033122221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20033122221 is a deficient number, since it is larger than the sum of its proper divisors (14830915923).

20033122221 is a wasteful number, since it uses less digits than its factorization.

20033122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13751 (or 13741 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 20033122221 its reverse (12222133002), we get a palindrome (32255255223).

The spelling of 20033122221 in words is "twenty billion, thirty-three million, one hundred twenty-two thousand, two hundred twenty-one".