20202221011211 has 4 divisors (see below), whose sum is σ = 20203334528832. Its totient is φ = 20201107493592.

The previous prime is 20202221011207. The next prime is 20202221011237. The reversal of 20202221011211 is 11211012220202.

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 20202221011211 - 2² = 20202221011207 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 20202221011211.

It is not an unprimeable number, because it can be changed into a prime (20202221011241) 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, 556731596 + ... + 556767881.

It is an arithmetic number, because the mean of its divisors is an integer number (5050833632208).

Almost surely, 2^{20202221011211} is an apocalyptic number.

20202221011211 is a deficient number, since it is larger than the sum of its proper divisors (1113517621).

20202221011211 is a wasteful number, since it uses less digits than its factorization.

20202221011211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1113517620.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20202221011211 its reverse (11211012220202), we get a palindrome (31413233231413).

The spelling of 20202221011211 in words is "twenty trillion, two hundred two billion, two hundred twenty-one million, eleven thousand, two hundred eleven".