20122210221 has 8 divisors (see below), whose sum is σ = 26830948224. Its totient is φ = 13414139520.

The previous prime is 20122210217. The next prime is 20122210223. The reversal of 20122210221 is 12201222102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20122210221 - 2² = 20122210217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20122210221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122210223) 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 7 ways as a sum of consecutive naturals, for example, 91620 + ... + 220541.

It is an arithmetic number, because the mean of its divisors is an integer number (3353868528).

Almost surely, 2^20122210221 is an apocalyptic number.

It is an amenable number.

20122210221 is a deficient number, since it is larger than the sum of its proper divisors (6708738003).

20122210221 is a wasteful number, since it uses less digits than its factorization.

20122210221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333651.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20122210221 its reverse (12201222102), we get a palindrome (32323432323).

The spelling of 20122210221 in words is "twenty billion, one hundred twenty-two million, two hundred ten thousand, two hundred twenty-one".