22011220211021 has 2 divisors, whose sum is σ = 22011220211022. Its totient is φ = 22011220211020.

The previous prime is 22011220210961. The next prime is 22011220211023. The reversal of 22011220211021 is 12011202211022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18636394026121 + 3374826184900 = 4316989^2 + 1837070^2 .

It is a cyclic number.

It is not a de Polignac number, because 22011220211021 - 2¹⁸ = 22011219948877 is a prime.

Together with 22011220211023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22011220211023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11005610105510 + 11005610105511.

It is an arithmetic number, because the mean of its divisors is an integer number (11005610105511).

Almost surely, 2^{22011220211021} is an apocalyptic number.

It is an amenable number.

22011220211021 is a deficient number, since it is larger than the sum of its proper divisors (1).

22011220211021 is an equidigital number, since it uses as much as digits as its factorization.

22011220211021 is an odious number, because the sum of its binary digits is odd.

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

Adding to 22011220211021 its reverse (12011202211022), we get a palindrome (34022422422043).

The spelling of 22011220211021 in words is "twenty-two trillion, eleven billion, two hundred twenty million, two hundred eleven thousand, twenty-one".