20212310222221 has 8 divisors (see below), whose sum is σ = 21767168450720. Its totient is φ = 18657461298672.

The previous prime is 20212310222213. The next prime is 20212310222347. The reversal of 20212310222221 is 12222201321202.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20212310222221 - 2³ = 20212310222213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20212310222192 and 20212310222201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20212310223221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2566426 + ... + 6856468.

It is an arithmetic number, because the mean of its divisors is an integer number (2720896056340).

Almost surely, 2^{20212310222221} is an apocalyptic number.

It is an amenable number.

20212310222221 is a deficient number, since it is larger than the sum of its proper divisors (1554858228499).

20212310222221 is a wasteful number, since it uses less digits than its factorization.

20212310222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4652475.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 20212310222221 its reverse (12222201321202), we get a palindrome (32434511543423).

The spelling of 20212310222221 in words is "twenty trillion, two hundred twelve billion, three hundred ten million, two hundred twenty-two thousand, two hundred twenty-one".