20221210221211 has 4 divisors (see below), whose sum is σ = 21285484443400. Its totient is φ = 19156935999024.

The previous prime is 20221210221181. The next prime is 20221210221263. The reversal of 20221210221211 is 11212201212202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20221210221211 - 2⁹ = 20221210220699 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 1064274222169 = 20221210221211 / (2 + 0 + 2 + 2 + 1 + 2 + 1 + 0 + 2 + 2 + 1 + 2 + 1 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20221210221271) 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, 532137111066 + ... + 532137111103.

It is an arithmetic number, because the mean of its divisors is an integer number (5321371110850).

Almost surely, 2^{20221210221211} is an apocalyptic number.

20221210221211 is a deficient number, since it is larger than the sum of its proper divisors (1064274222189).

20221210221211 is a wasteful number, since it uses less digits than its factorization.

20221210221211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1064274222188.

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

Adding to 20221210221211 its reverse (11212201212202), we get a palindrome (31433411433413).

Subtracting from 20221210221211 its reverse (11212201212202), we obtain a palindrome (9009009009009).

The spelling of 20221210221211 in words is "twenty trillion, two hundred twenty-one billion, two hundred ten million, two hundred twenty-one thousand, two hundred eleven".