20122102221 has 32 divisors (see below), whose sum is σ = 29751802752. Its totient is φ = 12018032640.

The previous prime is 20122102219. The next prime is 20122102223. The reversal of 20122102221 is 12220122102.

It is an interprime number because it is at equal distance from previous prime (20122102219) and next prime (20122102223).

It is not a de Polignac number, because 20122102221 - 2¹ = 20122102219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20122102221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122102223) 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, 276006 + ... + 341208.

It is an arithmetic number, because the mean of its divisors is an integer number (929743836).

Almost surely, 2^20122102221 is an apocalyptic number.

It is an amenable number.

20122102221 is a deficient number, since it is larger than the sum of its proper divisors (9629700531).

20122102221 is a wasteful number, since it uses less digits than its factorization.

20122102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65453.

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

Adding to 20122102221 its reverse (12220122102), we get a palindrome (32342224323).

The spelling of 20122102221 in words is "twenty billion, one hundred twenty-two million, one hundred two thousand, two hundred twenty-one".