20031202221 has 32 divisors (see below), whose sum is σ = 28460678400. Its totient is φ = 12488269824.

The previous prime is 20031202211. The next prime is 20031202223. The reversal of 20031202221 is 12220213002.

It is a happy number.

It is not a de Polignac number, because 20031202221 - 2⁶ = 20031202157 is a prime.

It is a super-3 number, since 3×20031202221³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20031202221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20031202223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5806105 + ... + 5809553.

It is an arithmetic number, because the mean of its divisors is an integer number (889396200).

Almost surely, 2^20031202221 is an apocalyptic number.

It is an amenable number.

20031202221 is a deficient number, since it is larger than the sum of its proper divisors (8429476179).

20031202221 is a wasteful number, since it uses less digits than its factorization.

20031202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4165.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 20031202221 its reverse (12220213002), we get a palindrome (32251415223).

The spelling of 20031202221 in words is "twenty billion, thirty-one million, two hundred two thousand, two hundred twenty-one".