20122112210221 has 24 divisors (see below), whose sum is σ = 23557116298560. Its totient is φ = 17137229683392.

The previous prime is 20122112210219. The next prime is 20122112210257. The reversal of 20122112210221 is 12201221122102.

It is not a de Polignac number, because 20122112210221 - 2¹ = 20122112210219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122112213221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30398545 + ... + 31053433.

It is an arithmetic number, because the mean of its divisors is an integer number (981546512440).

Almost surely, 2^{20122112210221} is an apocalyptic number.

It is an amenable number.

20122112210221 is a deficient number, since it is larger than the sum of its proper divisors (3435004088339).

20122112210221 is a wasteful number, since it uses less digits than its factorization.

20122112210221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658913 (or 658906 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 20122112210221 its reverse (12201221122102), we get a palindrome (32323333332323).

The spelling of 20122112210221 in words is "twenty trillion, one hundred twenty-two billion, one hundred twelve million, two hundred ten thousand, two hundred twenty-one".