20122202010221 has 4 divisors (see below), whose sum is σ = 20266966053600. Its totient is φ = 19977437966844.

The previous prime is 20122202010179. The next prime is 20122202010223. The reversal of 20122202010221 is 12201020222102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20122202010221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20122202010221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122202010223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72382021481 + ... + 72382021758.

It is an arithmetic number, because the mean of its divisors is an integer number (5066741513400).

Almost surely, 2^{20122202010221} is an apocalyptic number.

It is an amenable number.

20122202010221 is a deficient number, since it is larger than the sum of its proper divisors (144764043379).

20122202010221 is a wasteful number, since it uses less digits than its factorization.

20122202010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144764043378.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20122202010221 its reverse (12201020222102), we get a palindrome (32323222232323).

The spelling of 20122202010221 in words is "twenty trillion, one hundred twenty-two billion, two hundred two million, ten thousand, two hundred twenty-one".