20212221033 has 40 divisors (see below), whose sum is σ = 32382504000. Its totient is φ = 12524702112.

The previous prime is 20212221019. The next prime is 20212221053. The reversal of 20212221033 is 33012221202.

It is not a de Polignac number, because 20212221033 - 2⁶ = 20212220969 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20212220997 and 20212221015.

It is not an unprimeable number, because it can be changed into a prime (20212221013) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 42333 + ... + 205466.

It is an arithmetic number, because the mean of its divisors is an integer number (809562600).

Almost surely, 2^20212221033 is an apocalyptic number.

It is an amenable number.

20212221033 is a deficient number, since it is larger than the sum of its proper divisors (12170282967).

20212221033 is a wasteful number, since it uses less digits than its factorization.

20212221033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247883 (or 247874 counting only the distinct ones).

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

Adding to 20212221033 its reverse (33012221202), we get a palindrome (53224442235).

The spelling of 20212221033 in words is "twenty billion, two hundred twelve million, two hundred twenty-one thousand, thirty-three".