1021110001273 has 2 divisors, whose sum is σ = 1021110001274. Its totient is φ = 1021110001272.

The previous prime is 1021110001259. The next prime is 1021110001279. The reversal of 1021110001273 is 3721000111201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 730688168809 + 290421832464 = 854803^2 + 538908^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021110001273 - 2²¹ = 1021107904121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1021110001273.

It is not a weakly prime, because it can be changed into another prime (1021110001279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510555000636 + 510555000637.

It is an arithmetic number, because the mean of its divisors is an integer number (510555000637).

Almost surely, 2^{1021110001273} is an apocalyptic number.

It is an amenable number.

1021110001273 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021110001273 is an equidigital number, since it uses as much as digits as its factorization.

1021110001273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84, while the sum is 19.

Adding to 1021110001273 its reverse (3721000111201), we get a palindrome (4742110112474).

The spelling of 1021110001273 in words is "one trillion, twenty-one billion, one hundred ten million, one thousand, two hundred seventy-three".