21222021023101 has 2 divisors, whose sum is σ = 21222021023102. Its totient is φ = 21222021023100.

The previous prime is 21222021023057. The next prime is 21222021023117. The reversal of 21222021023101 is 10132012022212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12476959611076 + 8745061412025 = 3532274^2 + 2957205^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21222021023101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21222021023141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611010511550 + 10611010511551.

It is an arithmetic number, because the mean of its divisors is an integer number (10611010511551).

Almost surely, 2^{21222021023101} is an apocalyptic number.

It is an amenable number.

21222021023101 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222021023101 is an equidigital number, since it uses as much as digits as its factorization.

21222021023101 is an odious number, because the sum of its binary digits is odd.

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

Adding to 21222021023101 its reverse (10132012022212), we get a palindrome (31354033045313).

The spelling of 21222021023101 in words is "twenty-one trillion, two hundred twenty-two billion, twenty-one million, twenty-three thousand, one hundred one".