1011020221193 has 2 divisors, whose sum is σ = 1011020221194. Its totient is φ = 1011020221192.

The previous prime is 1011020221171. The next prime is 1011020221219. The reversal of 1011020221193 is 3911220201101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1011016173049 + 4048144 = 1005493^2 + 2012^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1011020221193 is a prime.

It is a super-2 number, since 2×1011020221193² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1011020221493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505510110596 + 505510110597.

It is an arithmetic number, because the mean of its divisors is an integer number (505510110597).

Almost surely, 2^{1011020221193} is an apocalyptic number.

It is an amenable number.

1011020221193 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011020221193 is an equidigital number, since it uses as much as digits as its factorization.

1011020221193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 23.

Adding to 1011020221193 its reverse (3911220201101), we get a palindrome (4922240422294).

The spelling of 1011020221193 in words is "one trillion, eleven billion, twenty million, two hundred twenty-one thousand, one hundred ninety-three".