20211310202221 has 16 divisors (see below), whose sum is σ = 20718873842688. Its totient is φ = 19706986886400.

The previous prime is 20211310202207. The next prime is 20211310202233. The reversal of 20211310202221 is 12220201311202.

It is a cyclic number.

It is not a de Polignac number, because 20211310202221 - 2²³ = 20211301813613 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 (20211310202021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 233718931 + ... + 233805391.

It is an arithmetic number, because the mean of its divisors is an integer number (1294929615168).

Almost surely, 2^{20211310202221} is an apocalyptic number.

It is an amenable number.

20211310202221 is a deficient number, since it is larger than the sum of its proper divisors (507563640467).

20211310202221 is a wasteful number, since it uses less digits than its factorization.

20211310202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105132.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 20211310202221 its reverse (12220201311202), we get a palindrome (32431511513423).

The spelling of 20211310202221 in words is "twenty trillion, two hundred eleven billion, three hundred ten million, two hundred two thousand, two hundred twenty-one".