1020221101819 has 2 divisors, whose sum is σ = 1020221101820. Its totient is φ = 1020221101818.

The previous prime is 1020221101793. The next prime is 1020221101829. The reversal of 1020221101819 is 9181011220201.

It is a strong prime.

It is an emirp because it is prime and its reverse (9181011220201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1020221101819 - 2¹¹ = 1020221099771 is a prime.

It is a super-2 number, since 2×1020221101819² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1020221101829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510110550909 + 510110550910.

It is an arithmetic number, because the mean of its divisors is an integer number (510110550910).

Almost surely, 2^{1020221101819} is an apocalyptic number.

1020221101819 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020221101819 is an equidigital number, since it uses as much as digits as its factorization.

1020221101819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 28.

The spelling of 1020221101819 in words is "one trillion, twenty billion, two hundred twenty-one million, one hundred one thousand, eight hundred nineteen".